Chapter 39

The Indian, or white, and the Javan rhinoceroses (Rhinoceros Indicus and R. Sondaicus) have incisor and canine teeth, but only one horn, and the very thick skin forms shieldlike folds. The two or three African species belong to Atelodus, and have two horns, but lack the dermal folds, and the incisor and canine teeth. The two Malay, or East Indian, two- horned species belong to Ceratohinus, in which incisor and canine teeth are present. See Borele, and Keitloa.

Rhinoceros auk (Zoöl.), an auk of the North Pacific (Cerorhina monocrata) which has a deciduous horn on top of the bill. -- Rhinoceros beetle (Zoöl.), a very large beetle of the genus Dynastes, having a horn on the head. -- Rhinoceros bird. (Zoöl.) (a) A large hornbill (Buceros rhinoceros), native of the East Indies. It has a large hollow hornlike process on the bill. Called also rhinoceros hornbill. See Hornbill. (b) An African beefeater (Buphaga Africana). It alights on the back of the rhinoceros in search of parasitic insects.

Rhi*noc"e*rote (?), n. A rhinoceros. [Obs.] B. Jonson.

Rhi*noc`e*rot"ic (?), a. Of or pertaining to the rhinoceros. [R.]

{ Rhi"no*lite (?), Rhi"no*lith (?), } n. [Rhino- + -lite, -lith.] (Med.) A concretion formed within the cavities of the nose.

Rhi`no*log"ic*al (?), a. Of or pertaining to rhinology.

Rhi*nol"o*gist (?), n. One skilled in rhinology.

Rhi*nol"o*gy (?), n. [Rhino- + -logy.] The science which treats of the nose, and its diseases.

Rhi*nol"o*phid (?), n. [Rhino- + Gr. &?;&?;&?; crest.] (Zoöl.) Any species of the genus Rhinilophus, or family Rhinolophidæ, having a horseshoe-shaped nasal crest; a horseshoe bat.

Rhi*nol"o*phine (?), a. (Zoöl.) Like or pertaining to the rhinolophids, or horseshoe bats.

Rhi"no*phore (?), n. [Rhino- + Gr. &?;&?;&?; to bear.] (Zoöl.) One of the two tentacle-like organs on the back of the head or neck of a nudibranch or tectibranch mollusk. They are usually retractile, and often transversely furrowed or plicate, and are regarded as olfactory organs. Called also dorsal tentacles. See Illust. under Pygobranchia, and Opisthobranchia.

Rhi`no*plas"tic (?), a. [Rhino- + -plastic: cf. F. rhinoplastique.] (Surg.) Of or pertaining to rhinoplasty; as, a rhinoplastic operation.

Rhi"no*plas`ty (?), n. [Rhino- + -plasty: cf. F. rhinoplastie.] Plastic surgery of the nose to correct deformity or to replace lost tissue. Tissue may be transplanted from the patient's cheek, forehead, arm, etc., or even from another person.

Rhi"no*pome (?), n. [Rhino- + Gr. pw^ma a lid. ] (Zoöl.) Any old-world bat of the genus Rhinopoma. The rhinopomes have a long tail extending beyond the web, and inhabit caves and tombs.

||Rhi`no*scle*ro"ma (?), n. [Rhino- + scleroma.] (Med.) A rare disease ||of the skin, characterized by the development of very hard, more or ||less flattened, prominences, appearing first upon the nose and ||subsequently upon the neighboring parts, esp. the lips, palate, and ||throat. J. V. Shoemaker.

Rhi"no*scope (?), n. [Rhino- + -scope.] A small mirror for use in rhinoscopy.

Rhi`no*scop"ic (?), a. (Physiol.) Of or pertaining to rhinoscopy.

Rhi*nos"co*py (?), n. [Rhino- + -scopy.] (Physiol.) The examination or study of the soft palate, posterior nares, etc., by means of a laryngoscopic mirror introduced into the pharynx.

||Rhi`no*the"ca (?), n.; pl. Rhinothecæ (#). [NL., from gr. &?;&?;&?;, ||&?;&?;&?;, the nose + &?;&?;&?; case.] (Zoöl.) The sheath of the ||upper mandible of a bird.

||Rhi*pi`do*glos"sa (?), n. pl. [NL., fr. Gr. &?;&?;&?; a fan + ||&?;&?;&?;&?; a tongue.] (Zoöl.) A division of gastropod mollusks ||having a large number of long, divergent, hooklike, lingual teeth in ||each transverse row. It includes the scutibranchs. See Illustration ||in Appendix.

Rhi*pip"ter (?), n. [Gr. &?;&?;&?; a fan + &?;&?;&?; wing.] (Zoöl.) One of the Rhipiptera, a group of insects having wings which fold like a fan; a strepsipter.

Rhi*pip"ter*an (?), n. (Zoöl.) Same as Rhipipter.

Rhi*zan"thous (?), a. [Gr. &?;&?;&?; root + &?;&?;&?; flower.] (Bot.) Producing flowers from a rootstock, or apparently from a root.

Rhi"zine (?), n. [Gr. &?;&?;&?; root.] (Bot.) A rootlike filament or hair growing from the stems of mosses or on lichens; a rhizoid.

Rhi`zo*car"pous (?), a. [Gr. &?;&?;&?; root + &?;&?;&?; fruit.] (Bot.) Having perennial rootstocks or bulbs, but annual flowering stems; -- said of all perennial herbs.

||Rhi`zo*ceph"a*la (?), n. pl. [NL., fr. Gr. &?;&?;&?; root + &?;&?;&?; ||head.] (Zoöl.) A division of Pectostraca including saclike parasites ||of Crustacea. They adhere by rootlike extensions of the head. See ||Illusration in Appendix.

Rhiz"o*dont (?), n. [Gr. &?;&?;&?; root + &?;&?;&?;, &?;&?;&?;, a tooth.] (Zoöl.) A reptile whose teeth are rooted in sockets, as the crocodile.

Rhiz"o*gan (?), a. [Gr. &?;&?;&?; root + -gen: cf. F. rhizogène.] (Bot.) Prodicing roots.

Rhiz"o*gen, n. (Bot.) One of a proposed class of flowering plants growning on the roots of other plants and destitute of green foliage.

Rhi"zoid (?), n. [Gr. &?;&?;&?; root + -oid.] (Bot.) A rootlike appendage.

||Rhi*zo"ma (?), n.; pl. Rhizomata (#). [NL.] (Bot.) SAme as Rhizome.

Rhi*zo"ma*tous (?), a. (Bot.) Having the nature or habit of a rhizome or rootstock.

Rhi*zome" (?), n. [Gr. &?;&?;&?; the mass of roots (of a tree), a stem, race, fr. &?;&?;&?; to make to root, pass., to take root, fr. &?;&?;&?; a root: cf. F. rhizome.] (Bot.) A rootstock. See Rootstock.

||Rhi*zoph"a*ga (?), n. pl. [NL.] (Zoöl.) A division of marsupials. The ||wombat is the type.

Rhi*zoph"a*gous (?), a. [Gr. &?;&?;&?;; &?;&?;&?; a root + &?;&?;&?; to eat.] Feeding on roots; root- eating.

||Rhi*zoph"o*ra (?), n. [NL. See Rhizophorous.] (Bot.) A genus of trees ||including the mangrove. See Mangrove.

Rhi*zoph"o*rous (?), a. [Gr. &?;&?;&?; a root + &?;&?;&?;&?; to bear.] (Bot.) Bearing roots.

Rhiz"o*pod (?), n. (Zoöl.) One of the Rhizopoda.

The rhizopods belonging to the Radiolaria and Foraminifera have been of great geological importance, especially in the Cretaceous and Tertiary periods. Chalk is mostly made from the shells of Foraminifera. The nummulites are the principal ingredient of a limestone which is of great extent in Europe and Asia, and is the material of which some of the pyramids of Egypt are made. The shells are abundant in deepsea mud, and are mostly minute, seldom larger than a small grain of sand, except in the case of the nummulities, which are sometimes an inch in diameter.

||Rhi*zop"o*da (?), n. pl. [NL., fr. Gr. &?;&?;&?; a root + -poda.] ||(Zoöl.) An extensive class of Protozoa, including those which have ||pseudopodia, by means of which they move about and take their food. ||The principal groups are Lobosa (or Amœbea), Helizoa, Radiolaria, and ||Foraminifera (or Reticularia). See Protozoa.

Rhi*zop"o*dous (?), a. (Zoöl.) Of or pertaining to the rhizopods.

||Rhi`zo*stom"a*ta (?), n. pl. [NL., fr. Gr. &?;&?;&?; a root + ||&?;&?;&?;, &?;&?;&?;&?;, a mouth.] (Zoöl.) A suborder of Medusæ which ||includes very large species without marginal tentacles, but having ||large mouth lobes closely united at the edges. See Illust. in ||Appendix.

Rhiz"o*stome (?), n. (Zoöl.) One of the Rhizostomata.

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||Rhi`zo*tax"is (?), n. [NL., fr. Gr. &?;&?;&?; a root + &?;&?;&?; ||arrangement.] (Bot.) The arrangement of the roots of plants.

Rhob (rb), n. See 1st Rob.

Rho`dam*mo"ni*um (?), a. (Chem.) Pertaining to, derived from, or containing, rhodium and ammonia; -- said of certain complex compounds.

Rho"da*nate (?), n. (Chem.) A salt of rhodanic acid; a sulphocyanate. [Obsoles.]

Rho*dan"ic (?), a. [Gr. &?;&?;&?; the rose.] (Chem.) Pertaining to, or designating, an acid (commonly called sulphocyanic acid) which frms a red color with ferric salts. [Obsoles.]

Rho`de*o*re"tin (?), n. [Gr. &?;&?;&?; the rose + &?;&?;&?; resin.] (Chem.) Same as Convolvuln.

Rho"di*an (?), a. [L. Rhodius: cf. F. rhodien.] Of or pertaining to Rhodes, an island of the Mediterranean. -- n. A native or inhabitant of Rhodes.

Rho"dic (?), a. (Chem.) Of or pertaining to rhodium; containing rhodium.

Rho"di*um (?), n. [NL., fr. Gr. "ro`don the rose. So called from the rose-red color of certain of its solutions. See Rhododendron.] (Chem.) A rare element of the light platinum group. It is found in platinum ores, and obtained free as a white inert metal which it is very difficult to fuse. Symbol Rh. Atomic weight 104.1. Specific gravity 12.

Rho`di*zon"ic (?), a. [Gr. &?;&?;&?; to be rose-red.] (Chem.) Pertaining to, or designating, a colorless crystalline substance (called rhodizonic acid, and carboxylic acid) obtained from potassium carboxide and from certain quinones. It forms brilliant red, yellow, and purple salts.

Rho`do*chro"site (?), n. [Gr. "ro`don the rose + &?;&?;&?; a coloring.] (Min.) Manganese carbonate, a rose-red mineral sometimes occuring crystallized, but generally massive with rhombohedral cleavage like calcite; -- called also dialogite.

Rho*doc"ri*nite (?), n. [Gr. "ro`don rose + &?;&?;&?; lily.] (Paleon.) A rose encrinite.

Rho`do*den"dron (?), n. [L., fr. Gr. "rodo`dendron, literally, rose tree; "ro`don rose + de`ndron tree. See Rose.] (Bot.) A genus of shrubs or small trees, often having handsome evergreen leaves, and remarkable for the beauty of their flowers; rosebay.

Rhod`o*mon*tade" (?), n. See Rodomontade.

Rhod`o*mon*tad"er (?), n. See Rodomontador.

Rho"don*ite (?), n. [Gr. "ro`don the rose. ] (Min.) Manganese spar, or silicate of manganese, a mineral occuring crystallised and in rose-red masses. It is often used as an ornamental stone.

Rho"do*phane (?), n. [Gr. "ro`don the rose + &?;&?;&?; to show.] (Physiol.) The red pigment contained in the inner segments of the cones of the retina in animals. See Chromophane. W. KÜhne.

Rho*dop"sin (?), n. [Gr. "ro`don rose + "w`ps eye.] (Physiol.) The visual purple. See under Visual.

Rho"do*sperm (?), n. [Gr. "ro`don the rose + spe`rma a seed.] (Bot.) Any seaweed with red spores.

As the name of a subclass, Rhodosperms, or Rhodospermeæ, is synonymous with Florideæ (which see.)

Rhomb (?), n. [L. rhombus, Gr. &?;&?;&?; rhomb, a spinning top, magic wheel, fr. &?;&?;&?; to turn or whirl round, perhaps akin to E. wrench: cf. F. rhombe. Cf. Rhombus, Rhumb.] 1. (Geom.) An equilateral parallelogram, or quadrilateral figure whose sides are equal and the opposite sides parallel. The angles may be unequal, two being obtuse and two acute, as in the cut, or the angles may be equal, in which case it is usually called a square.

2. (Geom.) A rhombohedron.

Fresnel's rhomb (Opt.), a rhomb or oblique parallelopiped of crown or St. Gobain glass so cut that a ray of light entering one of its faces at right angles shall emerge at right angles at the opposite face, after undergoing within the rhomb, at other faces, two reflections. It is used to produce a ray circularly polarized from a plane-polarized ray, or the reverse. Nichol.

Rhom"bic (?), a. 1. Shaped like a rhomb.

2. (Crystallog.) Same as Orthorhombic.

Rhom`bo*ga"noid (?), n. [Rhomb + ganoid.] (Zoöl.) A ganoid fish having rhombic enameled scales; one of the Rhomboganoidei.

||Rhom`bo*ga*noi"de*i (?), n. pl. [NL.] (Zoöl.) Same as Ginglymodi.

Rhom"bo*gene (?), n. [Rhomb + root of Gr. &?;&?;&?; to be born.] (Zoöl.) A dicyemid which produces infusorialike embryos; -- opposed to nematogene. See Dicyemata. [Written also rhombogen.]

Rhom`bo*he"dral (?), a. (Geom. & Crystallog.) Related to the rhombohedron; presenting the form of a rhombohedron, or a form derivable from a rhombohedron; relating to a system of forms including the rhombohedron and scalenohedron.

Rhombohedral iron ore (Min.) See Hematite. -- Rhombohedral system (Crystallog.), a division of the hexagonal system embracing the rhombohedron, scalenohedron, etc.

Rhom`bo*hed"ric (?), a. (Geom. & Crystallog.) Rhombohedral.

Rhom`bo*he"dron (?), n. [NL., fr. Gr. &?;&?;&?; rhomb + &?;&?;&?; seat, base.] (Geom. & Crystallog.) A solid contained by six rhomboids; a parallelopiped.

Rhom"boid (rm"boid), n. [Gr. &?;&?;&?; rhomboidal; &?;&?;&?; rhomb + e'i^dos shape: cf. F. rhomboïde.] (Geom.) An oblique-angled parallelogram like a rhomb, but having only the opposite sides equal, the length and with being different.

Rhom"boid (rm"boid), a. Same as Rhomboidal.

Rhom*boid"al (?), a. [Cf. F. rhomboïdal.] Having, or approaching, the shape of a rhomboid.

Rhom*boid"es (?), n. A rhomboid. [R.] Milton.

Rhom`boid-o"vate (?), a. Between rhomboid and ovate, or oval, in shape.

Rhomb" spar` (?). (Min.) A variety of dolomite.

Rhom"bus (?), n. [L.] Same as Rhomb, 1.

Rhon`chal (?), a. (Med.) Rhonchial.

Rhon"chi*al (?), a. (Med.) Of or pertaining to a rhonchus; produced by rhonchi.

Rhonchial fremitus. [L. fremitus a dull roaring or murmuring.] (Med.) A vibration of the chest wall that may be felt by the hand laid upon its surface. It is caused in the production of rhonchi in the bronchial tubes.

Rhon*chis"o*nant (?), a. [L. rhonchus a snoring + sonans, p. pr. of sonare to sound.] Making a snorting noise; snorting. [R.]

||Rhon"chus (?), n.; pl. Rhonchi (#). [L., a snoring, a croaking.] ||(Med.) An adventitious whistling or snoring sound heard on ||auscultation of the chest when the air channels are partially ||obstructed. By some writers the term rhonchus is used as equivalent ||to râle in its widest sense. See Râle.

Rho*pal"ic (?), a. [Gr. &?;&?;&?;&?; club-shaped; fr. &?;&?;&?; a club: cf. F. rhopalique.] (Pros.) Applied to a line or verse in which each successive word has one more syllable than the preceding.

||Rho*pa"li*um (?), n.; pl. Rhopalia (#). [NL.] (Zoöl.) One of the ||marginal sensory bodies of medusæ belonging to the Discophora.

||Rhop`a*loc"e*ra (?), n. pl. [NL., from Gr. &?;&?;&?; a club + ||&?;&?;&?; ahorn.] (Zoöl.) A division of Lepidoptera including all the ||butterflies. They differ from other Lepidoptera in having club-shaped ||antennæ.

Rho"ta*cism (?), n. [Gr. "rwtaki`zein to use the letter r (&rho;) overmuch: cf. F. rhotacisme.] An oversounding, or a misuse, of the letter r; specifically (Phylol.), the tendency, exhibited in the Indo-European languages, to change s to r, as wese to were.

Rhu"barb (?), n. [F. rhubarbe, OF. rubarbe, rheubarbe, reubarbare, reobarbe, LL. rheubarbarum for rheum barbarum, Gr. &?;&?;&?; (and &?;&?;) rhubarb, from the river Rha (the Volga) on whose banks it grew. Originally, therefore, it was the barbarian plant from the Rha. Cf. Barbarous, Rhaponticine.] 1. (Bot.) The name of several large perennial herbs of the genus Rheum and order Polygonaceæ.

2. The large and fleshy leafstalks of Rheum Rhaponticum and other species of the same genus. They are pleasantly acid, and are used in cookery. Called also pieplant.

3. (Med.) The root of several species of Rheum, used much as a cathartic medicine.

Monk's rhubarb. (Bot.) See under Monk. -- Turkey rhubarb (Med.), the roots of Rheum Emodi.

Rhu"barb*y (?), a. Like rhubarb.

Rhumb (?), n. [F. rumb, Sp. rumbo, or Pg. rumbo, rumo, probably fr. Gr. &?;&?;&?; a magic wheel, a whirling motion, hence applied to a point of the compass. See Rhomb.] (Navigation) A line which crosses successive meridians at a constant angle; -- called also rhumb line, and loxodromic curve. See Loxodromic.

To sail on a rhumb, to sail continuously on one course, following a rhumb line.

||Rhus (?), n. [L., sumac, fr. Gr. &?;&?;&?;.] (Bot.) A genus of shrubs ||and small treets. See Sumac.

Rhus"ma (?), n. [See Rusma.] A mixtire of caustic lime and orpiment, or tersulphide of arsenic, -- used in the depilation of hides. Knight.

Rhyme (?), n. [OE. ryme, rime, AS. rm number; akin to OHG. rm number, succession, series, G. reim rhyme. The modern sense is due to the influence of F. rime, which is of German origin, and originally the same word.] [The Old English spelling rime is becoming again common. See Note under Prime.] 1. An expression of thought in numbers, measure, or verse; a composition in verse; a rhymed tale; poetry; harmony of language. "Railing rhymes." Daniel.

A ryme I learned long ago.

Chaucer.

He knew Himself to sing, and build the lofty rime.

Milton.

2. (Pros.) Correspondence of sound in the terminating words or syllables of two or more verses, one succeeding another immediately or at no great distance. The words or syllables so used must not begin with the same consonant, or if one begins with a vowel the other must begin with a consonant. The vowel sounds and accents must be the same, as also the sounds of the final consonants if there be any.

For rhyme with reason may dispense, And sound has right to govern sense.

Prior.

3. Verses, usually two, having this correspondence with each other; a couplet; a poem containing rhymes.

4. A word answering in sound to another word.

Female rhyme. See under Female. - - Male rhyme. See under Male. -- Rhyme or reason, sound or sense. -- Rhyme royal (Pros.), a stanza of seven decasyllabic verses, of which the first and third, the second, fourth, and fifth, and the sixth and seventh rhyme.

Rhyme (?), v. i. [imp. & p. p. Rhymed (?);p. pr. & vb. n. Rhyming.] [OE. rimen, rymen, AS. rman to count: cf. F. rimer to rhyme. See Rhyme, n.] 1. To make rhymes, or verses. "Thou shalt no longer ryme." Chaucer.

There marched the bard and blockhead, side by side, Who rhymed for hire, and patronized for pride.

Pope.

2. To accord in rhyme or sound.

And, if they rhymed and rattled, all was well.

Dryden.

Rhyme, v. t. 1. To put into rhyme. Sir T. Wilson.

2. To influence by rhyme.

Hearken to a verser, who may chance Rhyme thee to good.

Herbert.

Rhyme"less, a. Destitute of rhyme. Bp. Hall.

Rhym"er (?), n. One who makes rhymes; a versifier; -- generally in contempt; a poor poet; a poetaster.

This would make them soon perceive what despicaple creatures our common rhymers and playwriters be.

Milton.

Rhym"er*y (?), n. The art or habit of making rhymes; rhyming; -- in contempt.

Rhyme"ster (?), n. A rhymer; a maker of poor poetry. Bp. Hall. Byron.

Rhym"ic (?), a. Pertaining to rhyme.

Rhym"ist, n. A rhymer; a rhymester. Johnston.

||Rhyn`chob*del"le*a (?), n. pl. [NL., fr. Gr. "ry`gchos snout + ||&?;&?;&?; a leech.] (Zoöl.) A suborder of leeches including those ||that have a protractile proboscis, without jaws. Clepsine is the ||type.

||Rhyn`cho*ceph"a*la (?), n. pl. [NL., fr. Gr. "ry`gchos snout + ||kefalh` head.] (Zoöl.) An order of reptiles having biconcave ||vertebræ, immovable quadrate bones, and many other peculiar ||osteological characters. Hatteria is the only living genus, but ||numerous fossil genera are known, some of which are among the ||earliest of reptiles. See Hatteria. Called also Rhynchocephalia.

||Rhyn`cho*cœ"la (?), n. pl. [NL., fr. Gr. "ry`gchos snout + koi`los ||hollow.] (Zoöl.) Same as Nemertina. -- Rhyn`cho*cœ"lous (#), a.

Rhyn"cho*lite (&?;), n. [Gr. "ry`gchos snout, beak + -lie: cf. F. rhyncholithe.] (Paleon.) A fossil cephalopod beak.

||Rhyn`cho*nel"la (&?;), n. [NL., fr. Gr. "ry`gchos snout.] (Zoöl.) A ||genus of brachiopods of which some species are still living, while ||many are found fossil.

||Rhyn*choph"o*ra (&?;), n. pl. [NL., fr. Gr. "ry`gchos snout + fe`rein ||to carry.] (Zoöl.) A group of Coleoptera having a snoutlike head; the ||snout beetles, curculios, or weevils.

Rhyn"cho*phore (?), n. (Zoöl.) One of the Rhynchophora.

||Rhyn*cho"ta (?), n. pl. [NL., fr. Gr. "ry`gchos snout.] (Zoöl.) Same ||as Hemiptera. [Written also Rhyncota.]

Rhy"o*lite (?), n. [Gr. "rei^n to flow + -lite.] (Min.) A quartzose trachyte, an igneous rock often showing a fluidal structure. -- Rhy`o*lit"ic, (#), a.

Rhy`pa*rog"ra*phy (?), n. [Gr. &?;&?;&?;&?; painting foul or mean objects; "ryparo`s filthy, dirty + gra`fein to write, paint.] In ancient art, the painting of genre or still-life pictures.

Rhy*sim"e*ter (?), n. [Gr. &?;&?;&?; flow + -meter.] An instrument, acting on the principle of Pitot's tube, for measuring the velocity of a fluid current, the speed of a ship, etc.

Rhythm (?), n. [F. rhythme, rythme, L. rhythmus, fr. Gr. &?;&?;&?; measured motion, measure, proportion, fr. "rei^n to flow. See Stream.] 1. In the widest sense, a dividing into short portions by a regular succession of motions, impulses, sounds, accents, etc., producing an agreeable effect, as in music poetry, the dance, or the like.

2. (Mus.) Movement in musical time, with periodical recurrence of accent; the measured beat or pulse which marks the character and expression of the music; symmetry of movement and accent. Moore (Encyc.)

3. A division of lines into short portions by a regular succession of arses and theses, or percussions and remissions of voice on words or syllables.

4. The harmonious flow of vocal sounds.

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Rhyth"mer (rth"mr or r"-), n. One who writes in rhythm, esp. in poetic rhythm or meter. [R.]

One now scarce counted a rhythmer, formerly admitted for a poet.

Fuller.

{ Rhyth"mic (-mk), Rhyth"mic*al (- m*kal), } a. [Gr. &?;&?;&?;&?;: cf. L. rhythmicus, F. rhythmique.] Pertaining to, or of the nature of, rhythm

Day and night I worked my rhythmic thought.

Mrs. Browning.

Rhythmical accent. (Mus.) See Accent, n., 6 (c).

Rhyth"mic*al*ly, adv. In a rhythmical manner.

Rhyth"mics (?), n. The department of musical science which treats of the length of sounds.

Rhyth"ming (?), a. Writing rhythm; verse making. "The rhythming monk." Fuller.

Rhythm"less (?), a. Being without rhythm. Coleridge.

Rhyth*mom"e*ter (?), n. [Rhythm + -meter.] An instrument for marking time in musical movements. See Metronome.

||Rhyth"mus (?), n. [L.] Rhythm.

||Rhyt"i*na (?), n. (Zoöl.) See Rytina.

Ri"al (&?;), n. A Spanish coin. See Real. [Obs.]

Ri*al", a. Royal. [Obs.] Chaucer.

Ri"al (?), n. [From Royal.] A gold coin formerly current in England, of the value of ten shillings sterling in the reign of Henry VI., and of fifteen shillings in the reign of Elizabeth. [Spelt also ryal.] Brande & C.

||Ri`ant" (?), a. [F. riant, p. pr. of rire to laugh, L. ridere.] ||Laughing; laughable; exciting gayety; gay; merry; delightful to the ||view, as a landscape.

In such cases the sublimity must be drawn from the other sources, with a strict caution, howewer, against anything light and riant.

Burke.

Rib (?), n. [AS. rib, ribb; akin to D. rib, G. rippe, OHG. rippa, rippi, Dan. ribbe, Icel. rif, Russ. rebro.] 1. (Anat.) One of the curved bones attached to the vertebral column and supporting the lateral walls of the thorax.

In man there are twelve ribs on each side, of which the upper seven are directly connected with the sternum by cartilages, and are called sternal, or true, ribs. The remaining five pairs are called asternal, or false, ribs, and of these each of the three upper pairs is attached to the cartilage of the rib above, while the two lower pairs are free at the ventral ends, and are called floating ribs. See Thorax.

2. That which resembles a rib in form or use. Specifically: (a) (Shipbuilding) One of the timbers, or bars of iron or steel, that branch outward and upward from the keel, to support the skin or planking, and give shape and strength to the vessel. (b) (Mach. & Structures) A ridge, fin, or wing, as on a plate, cylinder, beam, etc., to strengthen or stiffen it. (c) One of the rods on which the cover of an umbrella is extended. (d) A prominent line or ridge, as in cloth. (e) A longitudinal strip of metal uniting the barrels of a double-barreled gun.

3. (Bot.) The chief nerve, or one of the chief nerves, of a leaf. (b) Any longitudinal ridge in a plant.

4. (Arch.) (a) In Gothic vaulting, one of the primary members of the vault. These are strong arches, meeting and crossing one another, dividing the whole space into triangles, which are then filled by vaulted construction of lighter material. Hence, an imitation of one of these in wood, plaster, or the like. (b) A projecting mold, or group of moldings, forming with others a pattern, as on a ceiling, ornamental door, or the like.