OUTOLAK 



248 



OSTREA 



straight; trope, turning.] Turned in the 

 right direction: used especially of a seed in 

 which the foramen is opposite to the hilum. 



Ortolan, (or'to-lan). [The French name.] A 

 singing bird, belonging to Fringillidaj. 



Ortyx, (or'tiks). An American bird, corre- 

 sponding to the quail of the Old World. 



Orycteropus, (or-ik-ter'o-pus). [Gk. orykter, 

 digger; pous, foot.] A rat-like animal, be- 

 longing to Edentata. 0. Capensis: Cape 

 ant-eater; also called ground-hog and aard- 

 vark. 



Oryctology, ( or-ik-tol'6-ji ). [Gk. oryktos, 

 dug up; logos, discourse.] The branch of 

 geology which treats of fossils. 



Oryx, (p'riks). A variety of the antelope 

 = Antilope oryx ; 

 also called gems-boc: 

 found in South Africa. 



Oryza, (6-ri'za). [The 

 Greek name.] A plant 

 belonging to Gluma- 

 cese. O. sativa = 

 Rice. 



Os, (os). [The Latin'/ 

 word.] = Bone : 0. 

 articulare, v. Mal- 

 leus. 0. calcis=C&l- 

 cineum : the bone 

 of the heel. O. hyoid 

 = Hyoid bone, in Oryx, 



fishes. O. innominatum = Haunch = hip- 

 bone: a large bone fastened to the sacrum, 

 and having a socket in which the thigh bone 

 fits: composed of ilium, ptibis, and ischium. 

 0. quadratum, v. Malleus. 



Osage-orange=Maclura aurantiaca: a plant 

 belonging to Moracese. 



Osborne series, (oz'born). [O. Isle of Wight] 

 =St. Helen's series: fresh-water beds be- 

 longing to Upper Eocene. 



Oscillating, (os-sil-la'ting). [L. oscillo, I 

 swing.] O. engine: one in which the cylinder 

 oscillates. 



Oscillation, ( os-siHa'shun ). [L. oscillo, 1 

 swing. ] Vibration. Angular O. = Gyra- 

 tion. 



Oscula, (os'ku-la). [L. osculum, small mouth.] 

 Small openings or mouths. 



Osculation, ( os-ku-la'shun ). [L. osculum, 

 little mouth.]:=Contact. 



Ose, (os). A termination in organic chemistry, 

 used for sugars. E.g. sucrose, lactose, <fec. 



Osier, (6'zhi-er). [The French name.]=Salix 

 viminalis: a willow-like plant, belonging to 

 Salicacese. 



Osion. A termination, v. Oxion. 



Osmazome, (oz'ma-zom). [Gk. osme, smell; 

 zomos, juice.] An extract of flesh, of which 

 creatine is a constituent. 



Osmelite, (oz'me-lit)=Pectolite. 



Osmic acid, (oz'mik), [Osmium, q.v.] OsO^ 

 now called tetroxide of osmium. 



Osmiridium, (oz-mi-rid'i-um). [Osmium and 

 Iridium, q.v. ] = Iridosmine : an alloy of 

 osmium and iridium. 



Osmium, (oz'mi-um). [Gk. osme, odour.]= 

 Os: one of the noble metals; the least fusible 

 of all the metals. 



Osmose, (os'm6z). [Gk, osmos, an impulse.] 

 Penetration of porous vessels by liquids. 



Osttiunda, (os-mUn'da). [Osmunder, one of 

 the names of Thor.]=Fern-royal=flowering 

 fern: a plant belonging to Polypodiacere. 



Osmundacese, (os-mun-da'se-e). [Osmunda, 

 q.v.] A sub-division of fei-ns. v. Filices. 



Osprey, (os'pra). [Corruption of Ossifrage.]= 

 Fishing eagle = 

 Falco haliaetus= 

 Pandion halire- 

 tus : a bird of 

 prey; also called 

 Bald-buzzard. 



Ossein, (os'se-in). 

 fL. osseus, bony.] 

 Bone cartilage: a % 

 gelatinous tissue. 



Osseius, (os'e-us.) 

 [The Latin word.] 

 0. bony fishes: 

 bony fishes = 

 Teleostei, q.v. 



Ossicles, (os'si-klz). [L. ossiculum, small 

 bone.] Auditory ossicles : the stapes, mal- 

 leus, and incus: three small bones in the ear. 



Ossicula, (os-sik'u-la). [L. ossiculum, small 

 bone.] A general term for small bones. 



Ossification, (os-sif-i-ka'shun). The formation 

 of bone, from cartilage or fibrous tissue. 



Osteocolla, (os-te-6-kol'la). [Gk. osteon, bone; 

 kolla, glue.] 1. A variety of calc tufa. 2. 

 A glue obtained from bones. 



Osteolepis, (os-te-ol'e-pis). [Gk. osteon, bone; 

 lepis, scale.] A ganoid fish, known by fossil 

 remains found in the Old Red Sandstone. 



Osteolite, ( os'te-6-lit ). [Gk. osteon, bone; 

 lithos, stone.] = Apatite: a mineral, chiefly 

 phosphate and chlorate of lime: an altered 

 variety of apatite. 



Osteozoa, (os-te-o-zo'a). [Gk. osteon, bone; 

 2oo7i, animal.] Burmeister's term for Ver- 

 tebrata. 



Osteozoaria, ( os-te-6-zo-a'ria ). [Gk. osteon, 

 bone; 2oon, animal.] In De Blainville's and 

 Milne Edwards's classifications Vertebrata. 



Ostracoda, ( os-tra'ko-da ). [Gk. ostrakon, 

 shell; eidos, like.] Small crustaceans, with 

 hinged bivalve carapace, and branchice 

 attached to jaws: found fossil from Lower 

 Cambrian to recent rocks. 



Ostracoderma, (os-tra'ko-der-ma). [Gk. ostra- 

 kon, shell; derma, skin.] 1. A genus of 

 plants belonging to Fungales. 2. An animal 

 belonging to Crustacea. 3. Burmeister'a 

 term for a division of Crustacea, including 

 Cirripedia, Rotatoria, &c. 



Ostraciontidae, (os-tra-si-on'ti-de). [Gk. ostra- 

 kon, shell; eidos, form.] Trunk-fishes, Q.V.: 

 fishes belonging to Plectognathi. 



Ostracostei, (os'tra-kos'te-i). [Gk. ostrakon, 

 shell.] Placoganoid fishes, having the head 

 and fore part of body encased in ganoid 

 plates; extinct since Devonian period; in- 

 clude Pterichthys, Pteraspis, Cephalaspis, &c. 



Ostranite, (os'tra-nit)=Zircon, q.v. 



Ostrea, (os'tre-a). [The Latin name.] Oyster: 

 a molluscous animal, belonging to Pectinidie, 

 of which there are many fossil varieties. 



