Chapter 1767

Tri"gon (?) , n. [L. trigonum , Gr. <?/; <?/ (see Tri- ) + <?/ a corner, angle: cf. F. trigone .]

1. A figure having three angles; a triangle.

2. (Astrol.) (a) A division consisting of three signs. (b) Trine, an aspect of two planets distant 120 degrees from each other.

Hutton.

3. (Gr. & Rom. Antiq.) (a) A kind of triangular lyre or harp. (b) A kind of game at ball played by three persons standing at the angular points of a triangle.

Trigonal <Xpage=1538>

Trig"o*nal (?) , a. Having three angles, or corners; triangular; as, a trigonal stem, one having tree prominent longitudinal angles .

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Trigone <Xpage=1539>

Tri`gone" (?) , n. [F., literally, a trigon.] (Anat.) A smooth triangular area on the inner surface of the bladder, limited by the apertures of the ureters and urethra.

Trigonia <Xpage=1539>

Tri*go"ni*a (?) , n. [NL. See Trigon . So called in allusion to the triangular shape of some species.] (Zo\'94l.) A genus of pearly bivalve shells, numerous extinct species of which are characteristic of the Mesozoic rocks. A few living species exist on the coast of Australia.

Trigonocerous <Xpage=1539>

Trig`o*noc"er*ous (?) , a. [Gr. <?/ triangle + <?/ horn.] (Zo\'94l.) Having horns with three angles, like those of some species of goats.

Trigonometric, Trigonometrical <Xpage=1539>

Trig`o*no*met"ric (?) , Trig`o*no*met"ric*al (?) , [Cf. F. trigonom\'82trique .] Of or pertaining to trigonometry; performed by the rules of trigonometry.

-- Trig`o*no*met"ric*al*ly , adv.

Trigonometrical curve , a curve one of whose co\'94rdinates is a trigonometric function of the other. -- Trigonometrical function . See under Function . -- Trigonometrical lines , lines which are employed in solving the different cases of plane and spherical trigonometry, as sines, tangents, secants, and the like. These lines, or the lengths of them, are trigonometrical functions of the arcs and angles to which they belong. -- Trigonometrical survey . See under Survey .

Trigonometry <Xpage=1539>

Trig`o*nom"e*try (?) , n. ; pl. -tries (#) . [Gr. <?/ a triangle + -metry : cf. F. trigonom\'82trie . See Trigon .] 1. That branch of mathematics which treats of the relations of the sides and angles of triangles, which the methods of deducing from certain given parts other required parts, and also of the general relations which exist between the trigonometrical functions of arcs or angles.

2. A treatise in this science.

Analytical trigonometry , that branch of trigonometry which treats of the relations and properties of the trigonometrical functions. -- Plane trigonometry , and Spherical trigonometry , those branches of trigonometry in which its principles are applied to plane triangles and spherical triangles respectively.

Trigonous <Xpage=1539>

Trig"o*nous (?) , a. [L. trigonus , Gr. <?/. See Trigon .] Same as Trigonal .

Trigram <Xpage=1539>

Tri"gram (?) , n. [Pref. tri- + -gram .] Same as Trigraph .

Trigrammatic <Xpage=1539>

Tri`gram*mat"ic (?) , a. [Gr. <?/; <?/ + <?/ a letter.] Containing three letters or characters, or three sets of letters or characters.

Trigrammic <Xpage=1539>

Tri*gram"mic (?) , a. [Gr. <?/. See Trigrammatic .] Same as Trigrammatic .

Trigraph <Xpage=1539>

Tri"graph (?) , n. [Pref. tri- + -graph .] Three letters united in pronunciation so as to have but one sound, or to form but one syllable, as -ieu in adieu ; a triphthong.

Trigyn <Xpage=1539>

Tri"gyn (?) , n. (Bot.) Any one of the Trigynia.

Trigynia <Xpage=1539>

Tri*gyn"i*a (?) , n. pl. [NL., Gr. <?/ (see Tri- ) + <?/ a woman, a female.] (Bot.) A Linn\'91an order of plants having three pistils or styles.

Trigynian, Trigynous <Xpage=1539>

Tri*gyn"i*an (?) , Trig"y*nous (?) , a. (Bot.) Having three pistils or styles; of or pertaining to the Trigynia.

Trihedral <Xpage=1539>

Tri*he"dral (?) , a. [See Trihedron .] (Geom.) Having three sides or faces; thus, a trihedral angle is a solid angle bounded by three plane angles. [Written also triedral .]

Trihedron <Xpage=1539>

Tri*he"dron (?) , n. [Pref. tri- + Gr. <?/ a seat, base.] (Geom.) A figure having three sides.

Trihoral <Xpage=1539>

Tri*ho"ral (?) , a. [Pref. tri- + horal .] Occurring once in every three hours.

Trijugate <Xpage=1539>

Trij"u*gate (?) , a. [See Trijugous .] (Bot.) In three pairs; as, a trijugate leaf, or a pinnate leaf with three pairs of leaflets .

Trijugous <Xpage=1539>

Trij"u*gous (?) , a. [L. trijugus threefold; tri- + jugum a yoke.] (Bot.) Same as Trijugate .

Trikosane <Xpage=1539>

Tri"ko*sane (?) , n. [Pref. tri- + Gr. <?/ twenty.] (Chem.) A hydrocarbon, C23H48 , of the methane series, resembling paraffin; -- so called because it has twenty-three atoms of carbon in the molecule.

Trilateral <Xpage=1539>

Tri*lat"er*al (?) , a. [L. trilaterus ; tri- (see Tri- ) + latus , lateris , side: cf. F. trilat\'82ral . See Lateral .] (Geom.) Having three sides; being three-sided; as, a trilateral triangle . -- Tri*lat"er*al*ly , adv. -- Tri*lat"er*al*ness , n.

Trilemma <Xpage=1539>

Tri*lem"ma (?) , n. [NL., fr. Gr. <?/ (see Tri- ) + <?/ any thing received, in logic, an assumption. Cf. Dilemma .] 1. (Logic) A syllogism with three conditional propositions, the major premises of which are disjunctively affirmed in the minor. See Dilemma .

2. A state of things in which it is difficult to determine which one of three courses to pursue.

Trilinear <Xpage=1539>

Tri*lin"e*ar (?) , a. (Math.) Of, pertaining to, or included by, three lines; as, trilinear co\'94rdinates .

Trilingual <Xpage=1539>

Tri*lin"gual (?) , a. [L. trilinguis ; tri- (see Tri- ) + lingua tongue, language. See Lingual .] Containing, or consisting of, three languages; expressed in three languages.

The much-noted Rosetta stone . . . bears upon its surface a trilingual inscription. I. Taylor.

Trilinguar <Xpage=1539>

Tri*lin"guar (?) , a. See Trilingual .

Triliteral <Xpage=1539>

Tri*lit"er*al (?) , a. [Pref. tri- + literal .] Consisting of three letters; trigrammic; as, a triliteral root or word . -- n. A triliteral word.

Triliteralism <Xpage=1539>

Tri*lit"er*al*ism (?) , n. Same as Triliterality .

Triliterality, Triliteralness <Xpage=1539>

Tri*lit`er*al"i*ty (?) , Tri*lit"er*al*ness (?) , n. The quality of being triliteral; as, the triliterality of Hebrew roots .

W. D. Whitney.

Trilith <Xpage=1539>

Tri"lith (?) , n. Same as Trilithon .

Mollett.

Trilithic <Xpage=1539>

Tri*lith"ic (?) a. Pertaining to a trilith.

Trilithon <Xpage=1539>

Tril"i*thon (tr&icr;l"&icr;*th&ocr;n) , n. ; pl . Trilithons (#) [NL., fr. Gr.<?/ of or with three stones; <?/ (see Tri- ) + <?/ stone.] (Arch\'91ol.) A monument consisting of three stones; especially, such a monument forming a kind of doorway, as among the ancient Celts.

Trill <Xpage=1539>

Trill (?) , v. i. [OE. trillen to roll, turn round; of Scand. origin; cf. Sw. trilla to roll, Dan. trilde , Icel. &thorn;yrla to whirl, and E. thrill . Cf. Thrill .] To flow in a small stream, or in drops rapidly succeeding each other; to trickle.

Sir W. Scott.

And now and then an ample tear trilled down Her delicate cheek. Shak.

Whispered sounds Of waters, trilling from the riven stone. Glover.

Trill <Xpage=1539>

Trill (?) , v. t. [OE. trillen ; cf. Sw. trilla to roll.] To turn round; to twirl. [Obs.]

Gascoigne.

Bid him descend and trill another pin. Chaucer.

Trill <Xpage=1539>

Trill , v. t. [ imp. & p. p. Trilled (?) ; p. pr. & vb. n. Trilling .] [It. trillare ; probably of imitative origin.] To impart the quality of a trill to; to utter as, or with, a trill; as, to trill the r ; to trill a note.

The sober-suited songstress trills her lay. Thomson.

Trill <Xpage=1539>

Trill , v. i. To utter trills or a trill; to play or sing in tremulous vibrations of sound; to have a trembling sound; to quaver.

To judge of trilling notes and tripping feet. Dryden.

Trill <Xpage=1539>

Trill , n. [It. trillo , fr. trillare . See Trill to shake.]

1. A sound, of consonantal character, made with a rapid succession of partial or entire intermissions, by the vibration of some one part of the organs in the mouth -- tongue, uvula, epiglottis, or lip -- against another part; as, the r is a trill in most languages .

2. The action of the organs in producing such sounds; as, to give a trill to the tongue . d

3. (Mus.) A shake or quaver of the voice in singing, or of the sound of an instrument, produced by the rapid alternation of two contiguous tones of the scale; as, to give a trill on the high C . See Shake .

Trillachan <Xpage=1539>

Tril"la*chan (?) , n. (Zo\'94l.) The oyster catcher. [Prov. Eng.]

Trilling <Xpage=1539>

Tril"ling (?) , n. [Cf. G. drilling .] 1. One of tree children born at the same birth.

Wright.

2. (Crystallog.) A compound crystal, consisting of three individuals.

Trillion <Xpage=1539>

Tril"lion (?) , n. [F. trillion , formed from the pref. tri- in imitation of million a million. Cf. Billion .] According to the French notation, which is used upon the Continent generally and in the United States, the number expressed by a unit with twelve ciphers annexed; a million millions; according to the English notation, the number produced by involving a million to the third power, or the number represented by a unit with eighteen ciphers annexed. See the Note under Numeration .

Trillium <Xpage=1539>

Tril"li*um (?) , n. [NL.; cf. L. trilix triple-woven, triple.] (Bot.) A genus of liliaceous plants; the three-leaved nightshade; -- so called because all the parts of the plant are in threes.

Trillo <Xpage=1539>

Tril"lo (?) , n. [It. See Trill .] (Mus.) A trill or shake. See Trill .

Trilobate <Xpage=1539>

Tri*lo"bate (?) , a. [Pref. tri- + lobate .] Having three lobes.

Trilobation <Xpage=1539>

Tri`lo*ba"tion (?) , n. The state of being trilobate.

Trilobed <Xpage=1539>

Tri"lobed (?) , a. [Pref. tri- + lobe .] Same as Trilobate .

Trilobita <Xpage=1539>

Tri`lo*bi"ta (?) , n. pl. [NL.] (Paleon.) An extinct order of arthropods comprising the trilobites.

Trilobite <Xpage=1539>

Tri"lo*bite (tr&imac;"l&osl;*b&imac;t) , n. [Cf. F. trilobite . See Trilobate .] (Paleon.) Any one of numerous species of extinct arthropods belonging to the order Trilobita. Trilobites were very common in the Silurian and Devonian periods, but became extinct at the close of the Paleozoic. So named from the three lobes usually seen on each segment.

Trilobitic <Xpage=1539>

Tri`lo*bit"ic (?) , a. Of, pertaining to or containing, trilobites; as, trilobitic rocks .

Trilocular <Xpage=1539>

Tri*loc"u*lar (?) , a. [Pref. tri- + locular : cf. F. triloculaire .] Having three cells or cavities; as, a trilocular capsule; a trilocular heart .

Trilogy <Xpage=1539>

Tril"o*gy (?) , n. [Gr. <?/; pref. <?/ (see Tri- ) + <?/ speech, discourse: cf. F. trilogie .] A series of three dramas which, although each of them is in one sense complete, have a close mutual relation, and form one historical and poetical picture. Shakespeare's " Henry VI." is an example.

On the Greek stage, a drama, or acted story, consisted in reality of three dramas, called together a trilogy , and performed consecutively in the course of one day. Coleridge.

Triluminar, Triluminous <Xpage=1539>

Tri*lu"mi*nar (?) , Tri*lu"mi*nous (?) , a. [Pref. tri- + L. lumen , luminis , light.] Having three lights [R.]

Trim <Xpage=1539>

Trim (?) , v. t. [ imp. & p. p. Trimmed (?) ; p. pr. & vb. n. Trimming .] [OE. trimen , trumen , AS. trymian , trymman , to prepare, dispose, make strong, fr. trum firm, strong; of uncertain origin.] 1. To make trim; to put in due order for any purpose; to make right, neat, or pleasing; to adjust.

The hermit trimmed his little fire. Goldsmith.

2. To dress; to decorate; to adorn; to invest; to embellish; as, to trim a hat . <-- to trim a Christmas tree. -->

A rotten building newly trimmed over. Milton.

I was trimmed in Julia's gown. Shak.

3. To make ready or right by cutting or shortening; to clip or lop; to curtail; as, to trim the hair; to trim a tree . " And trimmed the cheerful lamp."

Byron.

4. (Carp.) To dress, as timber; to make smooth.

5. (Naut.) (a) To adjust, as a ship, by arranging the cargo, or disposing the weight of persons or goods, so equally on each side of the center and at each end, that she shall sit well on the water and sail well; as, to trim a ship, or a boat . (b) To arrange in due order for sailing; as, to trim the sails .

6. To rebuke; to reprove; also, to beat. [Colloq.]

To trim in (Carp.) , to fit, as a piece of timber, into other work. -- To trim up , to dress; to put in order.

I found her trimming up the diadem On her dead mistress. Shak.

Trim <Xpage=1539>

Trim (?) , v. i. To balance; to fluctuate between parties, so as to appear to favor each.

Trim <Xpage=1539>

Trim , n. 1. Dress; gear; ornaments.

Seeing him just pass the window in his woodland trim . Sir W. Scott.

2. Order; disposition; condition; as, to be in good trim . " The trim of an encounter."

Chapman.

3. The state of a ship or her cargo, ballast, masts, etc., by which she is well prepared for sailing.

4. (Arch) The lighter woodwork in the interior of a building; especially, that used around openings, generally in the form of a molded architrave, to protect the plastering at those points.

In ballast trim (Naut.) , having only ballast on board. R. H. Dana, Jr. -- Trim of the masts (Naut.) , their position in regard to the ship and to each other, as near or distant, far forward or much aft, erect or raking. -- Trim of sails (Naut.) , that adjustment, with reference to the wind, witch is best adapted to impel the ship forward.

Trim <Xpage=1539>

Trim , a. [ Compar. Trimmer (?) ; superl. Trimmest .] [See Trim , v. t. ] Fitly adjusted; being in good order., or made ready for service or use; firm; compact; snug; neat; fair; as, the ship is trim , or trim built; everything about the man is trim ; a person is trim when his body is well shaped and firm; his dress is trim when it fits closely to his body, and appears tight and snug; a man or a soldier is trim when he stands erect.

With comely carriage of her countenance trim . Spenser.

So deemed I till I viewed their trim array Of boats last night. Trench.

Trimaculated <Xpage=1539>

Tri*mac"u*la`ted (?) , a. [Pref. tri- + maculated .] Marked with three spots, or macul\'91.

Trimellic <Xpage=1539>

Tri*mel"lic (?) , a. [Pref. tri- + L. mel , gen. mellis , honey.] (Chem.) Of, pertaining to, or designating, a certain tribasic acid (called also trimellitic acid ) metameric with trimesitic acid.

Trimembral <Xpage=1539>

Tri*mem"bral , a. [L. trimembris triplemembered. See Tri- , and Member .] Having, or consisting of, three members.

Trimera <Xpage=1539>

Tri"me*ra (?) , n. pl. [NL. See Tri- , and -mere .] (Zo\'94l.) A division of Coleoptera including those which have but three joints in the tarsi.

Trimeran <Xpage=1539>

Tri"mer*an (?) , n. (Zo\'94l.) One of the Trimera. Also used adjectively.

Trimerous <Xpage=1539>

Tri"mer*ous (?) , a. [See Trimera .] (Bot.) Having the parts in threes.

Trimesitic <Xpage=1539>

Tri`me*sit"ic (?) , a. [Pref. tri- + mesit ylene + -ic .] (Chem.) Of, pertaining to, or designating, a tribasic acid, C6H3.(CO2)3 , of the aromatic series, obtained, by the oxidation of mesitylene, as a white crystalline substance. [Written also trimesic .]

Trimester <Xpage=1539>

Tri*mes"ter (?) , n. [L. trimestris of three months; tri- (see Tri- ) + mensis month: cf. F. trimestre .] A term or period of three months.

Trimestral <Xpage=1539>

Tri*mes"tral (?) , a. Trimestrial.

Southey.

Trimestrial <Xpage=1539>

Tri*mes"tri*al (?) , a. Of or pertaining to a trimester, or period of three months; occurring once in every three months; quarterly.

Trimeter <Xpage=1539>

Trim"e*ter (?) , a. [L. trimetrus , Gr. <?/; <?/ (see Tri- ) + <?/ measure . See Meter measure.] (Pros.) Consisting of three poetical measures. -- n. A poetical division of verse, consisting of three measures.

Lowth.

Trimethyl <Xpage=1539>

Tri*meth"yl (?) . ( Chem .) A prefix or combining form (also used adjectively) indicating the presence of three methyl groups .

Trimethylamine <Xpage=1539>