Chapter 1077

Os"ma*zome (?) , n. [Gr. <?/ smell, odor + <?/ broth: cf. F. osmaz\'93me .] (Old Chem.) A substance formerly supposed to give to soup and broth their characteristic odor, and probably consisting of one or several of the class of nitrogenous substances which are called extractives .

Osmiamate <Xpage=1015>

Os`mi*am"ate (?) , n. (Chem.) A salt of osmiamic acid.

Osmiamic <Xpage=1015>

Os`mi*am"ic (?) , a. [ Osmi um + am ido.] (Chem.) Of, pertaining to, or designating, a nitrogenous acid of osmium, H2N2Os2O5 , forming a well-known series of yellow salts.

Osmic <Xpage=1015>

Os"mic (?) , a. (Chem.) Pertaining to, derived from, or containing, osmium; specifically, designating those compounds in which it has a valence higher than in other lower compounds; as, osmic oxide .

Osmic acid . (Chem.) (a) Osmic tetroxide . [Obs.] (b) Osmic acid proper, an acid analogous to sulphuric acid, not known in the free state, but forming a well-known and stable series of salts (osmates), which were formerly improperly called osmites . -- Osmic tetroxide (Chem.) , a white volatile crystalline substance, OsO4 , the most stable and characteristic of the compounds of osmium. It has a burning taste, and gives off a vapor, which is a powerful irritant poison, violently attacking the eyes, and emitting a strong chlorinelike odor. Formerly improperly called osmic acid .

Osmidrosis <Xpage=1015>

Os`mi*dro"sis (?) , n. [NL., from Gr. <?/ smell + <?/ to sweat.] (Med.) The secretion of fetid sweat.

Osmious <Xpage=1015>

Os"mi*ous (?) , a. (Chem.) Denoting those compounds of osmium in which the element has a valence relatively lower than in the osmic compounds; as, osmious chloride . [Written also osmous .]

Osmious acid (Chem.) , an acid derived from osmium, analogous to sulphurous acid, and forming unstable salts. It is a brown amorphous substance.

Osmite <Xpage=1015>

Os"mite (?) , n. (Chem.) A salt of osmious acid.

Osmium <Xpage=1015>

Os"mi*um (?) , n. [Gr. <?/ a smell, odor, akin to <?/ to smell. So named in allusion to the strong chlorinelike odor of osmic tetroxide. See Odor .] (Chem.) A rare metallic element of the platinum group, found native as an alloy in platinum ore, and in iridosmine. It is a hard, infusible, bluish or grayish white metal, and the heaviest substance known. Its tetroxide is used in histological experiments to stain tissues. Symbol Os . Atomic weight 191.1. Specific gravity 22.477.

Osmometer <Xpage=1015>

Os*mom"e*ter (?) , n. [Gr. <?/ impulse + -meter .] (Physics) An instrument for measuring the amount of osmotic action in different liquids.

Osmometry <Xpage=1015>

Os*mom"e*try (?) , n. (Physics) The study of osmose by means of the osmometer.

Osmose <Xpage=1015>

Os"mose (?) , n. [Gr. <?/, equiv. to <?/ impulse, fr. <?/ to push.] (Chemical Physics) (a) The tendency in fluids to mix, or become equably diffused, when in contact. It was first observed between fluids of differing densities, and as taking place through a membrane or an intervening porous structure. The more rapid flow from the thinner to the thicker fluid was then called endosmose , and the opposite, slower current, exosmose . Both are, however, results of the same force. Osmose may be regarded as a form of molecular attraction, allied to that of adhesion. (b) The action produced by this tendency. <-- preferred term = osmosis, endosmosis -->

Electric osmose , &or; Electric endosmose (Elec.) , the transportation of a liquid through a porous septum by the action of an electric current.

Osmosis <Xpage=1015>

Os*mo"sis (?) , n. [NL.] Osmose.

Osmotic <Xpage=1015>

Os*mot"ic (?) , a. Pertaining to, or having the property of, osmose; as, osmotic force .

Osmund <Xpage=1015>

Os"mund (?) , n. (Bot.) A fern of the genus Osmunda , or flowering fern. The most remarkable species is the osmund royal , or royal fern ( Osmunda regalis ), which grows in wet or boggy places, and has large bipinnate fronds, often with a panicle of capsules at the top. The rootstock contains much starch, and has been used in stiffening linen. <-- used as a substrate for growing orchids -->

Osnaburg <Xpage=1015>

Os"na*burg (?) , n. A species of coarse linen, originally made in Osnaburg , Germany.

Oso-berry <Xpage=1015>

O"so-ber`ry (?) , n. (Bot.) The small, blueblack, drupelike fruit of the Nuttallia cerasiformis , a shrub of Oregon and California, belonging to the Cherry tribe of Rosace\'91 .

Osphradium <Xpage=1015>

Os*phra"di*um (?) , n. ; pl. Osphradia (#) . [NL., fr. Gr. <?/ strong scent, fr. <?/ to smell.] (Zo\'94l.) The olfactory organ of some Mollusca. It is connected with the organ of respiration.

Osprey, Ospray <Xpage=1015>

Os"prey , Os"pray (?) , n. [Through OF. fr. L. ossifraga (orig., the bone breaker); prob. influenced by oripelargus (mountain stork, a kind of eagle, Gr. <?/); cf. OF. orpres , and F. orfraie . See Ossifrage .] (Zo\'94l.) The fishhawk.

Oss <Xpage=1015>

Oss (?) , v. i. [See Osse , n. ] To prophesy; to presage. [R. & Obs.]

R. Edgeworth.

Osse <Xpage=1015>

Osse (?) , n. [Gr. <?/.] A prophetic or ominous utterance. [R. & Obs.]

Holland.

Ossean <Xpage=1015>

Os"se*an (?) , n. (Zo\'94l.) A fish having a bony skeleton; a teleost.

Ossein <Xpage=1015>

Os"se*in (?) , n. [L. os bone.] (Physiol. Chem.) The organic basis of bone tissue; the residue after removal of the mineral matters from bone by dilute acid; in embryonic tissue, the substance in which the mineral salts are deposited to form bone; -- called also ostein . Chemically it is the same as collagen .

Osselet <Xpage=1015>

Os"se*let (?) , n. [F.] 1. A little bone.

2. (Zo\'94l.) The internal bone, or shell, of a cuttlefish.

Osseous <Xpage=1015>

Os"se*ous (?) , a. [L. osseus , from os , ossis bone; akin to Gr. <?/, Skr. asthi . Cf. Oyster .] Composed of bone; resembling bone; capable of forming bone; bony; ossific.

Osseter <Xpage=1015>

Os"se*ter (?) , n. [Russ, osetr' sturgeon.] (Zo\'94l.) A species of sturgeon.

Ossianic <Xpage=1015>

Os`si*an"ic (?) , a. Of or pertaining to, or characteristic of, Ossian , a legendary Erse or Celtic bard.

The compositions might be fairly classed as Ossianic . G. Eliot.

Ossicle <Xpage=1015>

Os"si*cle (?) , n. [L. ossiculum , dim. of os , ossis , a bone.] 1. A little bone; as, the auditory ossicles in the tympanum of the ear .

2. (Zo\'94l.) One of numerous small calcareous structures forming the skeleton of certain echinoderms, as the starfishes.

Ossiculated <Xpage=1015>

Os*sic"u*la`ted (?) , a. Having small bones.

Ossiculum <Xpage=1015>

Os*sic"u*lum (?) , n. ; pl. Ossicula (#) . [L., a little bone.] (Zo\'94l.) Same as Ossicle .

Ossiferous <Xpage=1015>

Os*sif"er*ous (?) , a. [L. os , ossis , a bone + -ferous : cf. F. ossif\'8are .] Containing or yielding bone.

Ossific <Xpage=1015>

Os*sif"ic (?) , a. [L. os , ossis , bone + facere to make: cf. F. ossifique . See Fact .] Capable of producing bone; having the power to change cartilage or other tissue into bone.

Ossification <Xpage=1015>

Os`si*fi*ca"tion (?) , n. [Cf. F. ossification . See Ossify .] 1. (Physiol.) The formation of bone; the process, in the growth of an animal, by which inorganic material (mainly lime salts) is deposited in cartilage or membrane, forming bony tissue; ostosis.

&hand; Besides the natural ossification of growing tissue, there is the so-called accidental ossification which sometimes follows certain abnormal conditions, as in the ossification of an artery.

2. The state of being changed into a bony substance; also, a mass or point of ossified tissue.

Ossified <Xpage=1015>

Os"si*fied (?) , a. Changed to bone or something resembling bone; hardened by deposits of mineral matter of any kind; -- said of tissues.

Ossifrage <Xpage=1015>

Os"si*frage (?) , n. [L. ossifraga , ossifragus , osprey, fr. ossifragus bone breaking; os , ossis , a bone + frangere , fractum , to break. See Osseous , Break , and cf. Osprey , Ossifragous .] (Zo\'94l.) (a) The lammergeir. (b) The young of the sea eagle or bald eagle. [Obs.]

Ossifragous <Xpage=1015>

Os*sif"ra*gous (?) , a. [L. ossifragus . See Ossifrage .] Serving to break bones; bone-breaking.

Ossify <Xpage=1015>

Os"si*fy (?) , v. t. [ imp. & p. p. Ossified (?) ; p. pr. & vb. n. Ossifying (?) .] [L. os , ossis , bone + -fy : cf. F. ossifier . See Osseous .] 1. (Physiol.) To form into bone; to change from a soft animal substance into bone, as by the deposition of lime salts.

2. Fig.: To harden; as, to ossify the heart .

Ruskin.

Ossify <Xpage=1015>

Os"si*fy , v. i. (Physiol.) To become bone; to change from a soft tissue to a hard bony tissue.

Ossifying <Xpage=1015>

Os"si*fy`ing (?) , a. (Physiol.) Changing into bone; becoming bone; as, the ossifying process .

Ossivorous <Xpage=1015>

Os*siv"o*rous (?) , a. [L. os , ossis , bone + vorare to devour: cf. F. ossivore .] Feeding on bones; eating bones; as, ossivorous quadrupeds .

Derham.

Osspringer <Xpage=1015>

Os"spring*er (?) , n. The osprey. [R.]

Ossuarium <Xpage=1015>

Os`su*a"ri*um (?) , n. [L.] A charnel house; an ossuary.

Walpole.

Ossuary <Xpage=1015>

Os"su*a*ry (?) , n. ; pl. -ries (#) . [L. ossuarium , fr. ossuarius of or bones, fr. os , ossis , bone: cf. F. ossuaire .] A place where the bones of the dead are deposited; a charnel house. [Obs.]

Sir T. Browne.

Ost <Xpage=1015>

Ost (?) , n. See Oast .

Osteal <Xpage=1015>

Os"te*al (?) , a. [Gr. <?/ a bone.] Osseous.

Ostein <Xpage=1015>

Os"te*in (?) , n. [Gr. <?/ bone.] Ossein.

Osteitis <Xpage=1015>

Os`te*i"tis (?) , n. [NL. See Osteo- , and -itis .] (Med.) Inflammation of bone.

Osteler <Xpage=1015>

Os"tel*er (?) , n. Same as Hosteler .

Wyclif.

Ostend <Xpage=1015>

Os*tend" (?) , v. t. [L. ostendere to show.] To exhibit; to manifest. [Obs.]

Mercy to mean offenders we'll ostend . J. Webster.

Ostensibility <Xpage=1015>

Os*ten`si*bil"i*ty (?) , n. The quality or state of being ostensible.

Ostensible <Xpage=1015>

Os*ten"si*ble (?) , a. [From L. ostensus , p. p. of ostendere to show, prop., to stretch out before; fr. prefix obs- (old form of ob- ) + tendere to stretch. See Tend .]

1. Capable of being shown; proper or intended to be shown. [R.]

Walpole.

2. Shown; exhibited; declared; avowed; professed; apparent; -- often used as opposed to real or actual ; as, an ostensible reason, motive, or aim .

D. Ramsay.

<page="1016"> Page 1016

Ostensibly <Xpage=1016>

Os*ten"si*bly (?) , adv. In an ostensible manner; avowedly; professedly; apparently.

Walsh.

Ostensibly , we were intended to prevent filibustering into Texas, but really as a menace to Mexico. U. S. Grant.

Ostension <Xpage=1016>

Os*ten"sion (?) , n. [L. ostensio a showing: cf. F. ostension . See Ostend .] (Eccl.) The showing of the sacrament on the altar in order that it may receive the adoration of the communicants.

Ostensive <Xpage=1016>

Os*ten"sive (?) , a. Showing; exhibiting.

Ostensive demonstration (Math.) , a direct or positive demonstration, as opposed to the apagogical or indirect method.

Ostensively <Xpage=1016>

Os*ten"sive*ly , adv. In an ostensive manner.

Ostensorium, Ostensory <Xpage=1016>

Os`ten*so"ri*um (?) , Os*ten"so*ry (?) , n. ; pl. L. -soria (#) , E. -sories (#) . [NL. ostensorium : cf. F. ostensoir . See Ostensible .] (R. C. Ch.) Same as Monstrance .

Ostent <Xpage=1016>

Os"tent (?) , n. [L. ostentus , ostentum , fr. ostendere (p. p. ostensus and ostentus ) to show. See Ostensible .]

1. Appearance; air; mien.

Shak.

2. Manifestation; token; portent.

Dryden.

We asked of God that some ostent might clear Our cloudy business, who gave us sign. Chapman.

Ostentate <Xpage=1016>

Os"ten*tate (?) , v. t. [L. ostentatus , p. p. of ostentare , v. intens. fr. ostendere . See Ostent .] To make an ambitious display of; to show or exhibit boastingly. [R.]

Jer. Taylor.

Ostentation <Xpage=1016>

Os`ten*ta"tion (?) , n. [L. ostentatio : cf. F. ostentation .] 1. The act of ostentating or of making an ambitious display; unnecessary show; pretentious parade; -- usually in a detractive sense. "Much ostentation vain of fleshly arm."

Milton.

He knew that good and bountiful minds were sometimes inclined to ostentation . Atterbury.

2. A show or spectacle. [Obs.]

Shak.

Syn. -- Parade; pageantry; show; pomp; pompousness; vaunting; boasting. See Parade .

Ostentatious <Xpage=1016>

Os`ten*ta"tious (?) , a. Fond of, or evincing, ostentation; unduly conspicuous; pretentious; boastful.

Far from being ostentatious of the good you do. Dryden.

The ostentatious professions of many years. Macaulay.

-- Os`ten*ta"tious*ly , adv. -- Os`ten*ta"tious*ness , n.

Ostentator <Xpage=1016>

Os"ten*ta`tor (?) , n. [L.] One fond of display; a boaster.

Sherwood.

Ostentive <Xpage=1016>

Os*ten"tive (?) , a. Ostentatious. [Obs.]

Ostentous <Xpage=1016>

Os*ten"tous (?) , a. Ostentatious. [Obs.]

Feltham.

Osteo- <Xpage=1016>

Os"te*o- . A combining form of Gr. <?/ a bone .

Osteoblast <Xpage=1016>

Os"te*o*blast (?) , n. [ Osteo- + -blast .] (Anat.) One of the protoplasmic cells which occur in the osteogenetic layer of the periosteum, and from or around which the matrix of the bone is developed; an osteoplast.

Osteoclasis <Xpage=1016>

Os`te*o*cla"sis (?) , n. [NL. See Osteoclast .] (Surg.) The operation of breaking a bone in order to correct deformity.

Osteoclast <Xpage=1016>

Os"te*o*clast (?) , n. [ Osteo- + Gr. <?/ to break.]

1. (Physiol.) A myeloplax.

&hand; The osteoclasts occur usually in pits or cavities which they appear to have excavated, and are supposed to be concerned in the absorption of the bone matrix.

2. An instrument for performing osteoclasis.

Osteocolla <Xpage=1016>

Os`te*o*col"la (?) , n. [ Osteo- + Gr. <?/ glue.]

1. A kind of glue obtained from bones.

Ure.

2. A cellular calc tufa, which in some places forms incrustations on the stems of plants, -- formerly supposed to have the quality of uniting fractured bones.

Osteocomma <Xpage=1016>

Os`te*o*com"ma (?) , n. ; pl. L. Osteocommata (#) , E. Osteocommas (#) . [NL. See Osteo- , and Comma .] (Anat.) A metamere of the vertebrate skeleton; an osteomere; a vertebra.

Owen.

Osteocope <Xpage=1016>

Os"te*o*cope (?) , n. [Gr. <?/; <?/ a bone + <?/ a striking, pain: cf. F. ost\'82ocope .] (Med.) Pain in the bones; a violent fixed pain in any part of a bone. -- Os`te*o*cop"ic (#) , a.

Osteocranium <Xpage=1016>

Os`te*o*cra"ni*um (?) , n. [ Osteo- + cranium .] (Anat.) The bony cranium, as distinguished from the cartilaginous cranium.

Osteodentine <Xpage=1016>

Os`te*o*den"tine (?) , n. [ Osteo- + denite .] (Anat.) A hard substance, somewhat like bone, which is sometimes deposited within the pulp cavity of teeth.

Osteogen <Xpage=1016>

Os"te*o*gen (?) , n. [ Osteo- + -gen .] (Physiol.) The soft tissue, or substance, which, in developing bone, ultimately undergoes ossification.

Osteogenesis, Osteogeny <Xpage=1016>

Os`te*o*gen"e*sis (?) , Os`te*og"e*ny (?) , n. [ Osteo- + genesis , or the root of Gr. <?/ to be born: cf. F. ost\'82og\'82nie .] (Physiol.) The formation or growth of bone.

Osteogenetic <Xpage=1016>

Os`te*o*ge*net"ic (?) , a. (Physiol.) Connected with osteogenesis, or the formation of bone; producing bone; as, osteogenetic tissue; the osteogenetic layer of the periosteum.

Osteogenic <Xpage=1016>

Os`te*o*gen"ic (?) , a. (Physiol.) Osteogenetic.

Osteographer <Xpage=1016>

Os`te*og"ra*pher (?) , n. An osteologist.

Osteography <Xpage=1016>

Os`te*og"ra*phy (?) , n. [ Osteo- + -graphy .] The description of bones; osteology.

Osteoid <Xpage=1016>

Os"te*oid (?) , a. [ Osteo- + -oid : cf. Gr. <?/.] (Anat.) Resembling bone; bonelike.

Osteolite <Xpage=1016>

Os"te*o*lite (?) , n. [ Osteo- + -lite .] (Min.) A massive impure apatite, or calcium phosphate.

Osteologer <Xpage=1016>

Os`te*ol"o*ger (?) , n. One versed in osteology; an osteologist.

Osteologic, Osteological <Xpage=1016>

Os`te*o*log"ic (?) , Os`te*o*log"ic*al (?) , a. [Cf. F. ost\'82ologique .] Of or pertaining to osteology. -- Os`te*o*log"ic*al*ly , adv.

Osteologist <Xpage=1016>