OST- 



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OVA- 



The bony skull as distinguished 

 from the cartilaginous or chondro- 

 cranium (zool.}. 



osteodentine (os'teoden'tm) n. [Gk. 

 osteon, bone ; L. dens, a tooth.] 

 A variety of dentine which closely 

 approaches bone in structure (zool.}. 



osteodermis (os'teodeYmis) n. [Gk. 

 osteon, bone ; derma, skin.] A 

 dermis which is more or less 

 ossified ; a bony dermal plate 

 (zool.}. 



osteogen (os'teqje'n') n. [Gk. osteon, 

 bone ; genos, offspring.] The tissue 

 which alters and forms bone (phys.}. 



osteogenesis ((8s'teoj6n'6sis) n. [Gk. 

 osteon, bone ; genesis, descent.] 

 Bone formation (emb.}. 



osteogenetic (os'teqje'ne't'ik) a. [Gk. 

 osteon, bone ; genesis, descent.] 

 Pert, or causing the formation of 

 bone (emb.}. 



osteogenic (os'teojgn'lk) a. [Gk. 

 osteon, bone ; genos, offspring.] 

 Bone-producing (phys.}. 



osteoid (5s'teoid) a. [Gk. osteon, 

 bone ; eidos, form.] Bone - like 

 (anat.}. 



osteology (os'teol'oji) n. [Gk. osteon, 

 bone ; logos, discourse.] That part 

 of anatomy that deals with the 

 structure, nature, and development 

 of bones. 



osteoplastic (5s'teoplas'tik) a. [Gk. 

 osteon, bone ; plastos, moulded.] 

 Producing bone ; appl. certain cells 

 (emb.). 



osteoporosis (Ss'teoporo'sTs) n. [Gk. 

 osteon, bone ; poros, a pore.] The 

 absorption of bone, resulting in a 

 porous structure (phys.}. 



ostiolar (os'tiolar) a. [L. ostiolum, a 

 little door.] Pert, an ostiole (biol.}. 



ostiolate (os'tiolat) a. [L. ostiolum, 

 little door.] Provided with ostioles 

 (biol.}. 



ostiole (os'tlol) n. [L. ostiolum, little 

 door.] The opening of a con- 

 ceptacle, of a perithecium, of a 

 stoma, of an anther sac (bot.} ; the 

 inhalent aperture of a Sponge (zool.}. 



ostium (os'tium) n., ostia (os'tia) plu. 

 [L. ostium, a door.] Any mouth- 

 like opening ; the openings of the 

 Fallopian tubes ; the opening in 

 the crustacean heart by means of 

 which the blood enters the heart 



from the pericardium ; the opening 

 from flagellate canal into para- 

 gastric cavity in Sponges (zool.}. 



otic (o'tik) a. [Gk. ous, the ear.] Pert. 

 the region of the auditory capsule 

 (anaf.}. 



otidium (otid'mm) n. [Gk. ous, ear.] 

 The otocyst of a Mollusc (zool.}. 



otoconium (6'toko'nium) n. [Gk. ous, 

 ear ; konia, grain of sand.] One of 

 the minute particles found in the 

 internal ear (anat.}. 



otocrypt (6'tokript) n. [Gk. ous, ear ; 

 kryptos, hidden.] An open invagina- 

 tion of the integument of the foot 

 in certain Molluscs (zool.}. 



otocyst (o'tosist) n. [Gk. ous, ear ; 

 kystis, bladder.] A sac containing 

 fluid and otoliths, supposed to be 

 auditory (zool.}. 



otolith (6'tolith) n. [Gk. ous, ear; 

 lithos, stone.] The calcareous par- 

 ticle or plate-like structure found 

 in the ear or the auditory organ of 

 many animals (zool.}. 



otoporpae (o'topor'pe) n. plu. [Gk. 

 ous, ear ; porpe, a brooch.] Stripes 

 of cnidoblasts on the exumbrella of 

 Hydromedusae (zool.}. 



oval (6'val) a. [L. ovum, egg.] Egg- 

 shaped ; pert, an egg. 



ovalbuinin (o'valbu'min) n. [L. ovum, 

 egg ; albumen, white of egg.] The 

 chief constituent of white of egg 

 (phys.}. 



ovarian (ova'riSn) a. [L. ovanum, 

 an ovary.] Pert, an ovary. 



ovariole (ovar'iol) n. [L. ovarium, 

 ovary.] The ovarian tube of an 

 Insect ; the tubes which together 

 form the ovary (zool.}. 



ovarium (ova'rium) n. [L. ovarium, 

 ovary.] An ovary. 



ovary (6'vari) n. [L. ovarium, ovary.] 

 The essential female reproductive 

 organ (zool.} ; an enlarged portion 

 of the pistil or gynoecium (bot.}. 



ovate (6'vat) a. [L. ovum, egg.] 

 Egg-shaped. 



ovate-acuminate, appl. an ovate 

 lamina with a very sharp point ; 

 appl. leaves (bot.}. 



ovate-ellipsoidal, ovate, approach- 

 ing ellipsoid ; appl. leaves (bot.}. 



ovate-lanceolate, having a form of 

 lamina intermediate between ovate 

 and lanceolate (bot.}. 



