OPPOSITISEPALOUS 



936 



ORANGEADE 



Oppositisepalous {op-oz-it - is-ep'-al-us) \oppositus, 

 opposite ; sepalum, a sepal]. In biology, placed oppo- 

 site a sepal. 



Oppression {op-resk'-un) [oppressio ; opprimere, to bear 

 against]. Any sensation of pressure or weight upon 

 any part, especially the chest. 



Oprescu and Babes, Bacillus of. ' See Bacteria, 

 Synonymatic Table of. 



-ops, -opsia, -optic {-ops, -ops'-e-ah, -op'-tik) [hip, 

 eye]. Variant forms of a suffix denoting connection 

 with or relation to the eye. 



Opsialgia (op-se-al' '-je-ah) [_uip, face ; alyog, pain] . 

 Neuralgia of the face. 



Opsigonous {op-sig'-on-us) [pipe, late ; yiyveodai, to be 

 born]. Developing late. 



Opsiodont {op'-se-o-dont) [dipic, eye; bSo'vc, tooth]. 

 An eye-tooth. 



Opsiometer {op-se-om' -et-er) [oipaig, sight; fierpov, 

 measure]. The same as Optometer. 



Opsionosis {op-se-on' -o-sis) [oiiig, sight; vdaoq, disease]. 

 A disease of the eye, or of vision. 



Opsitocia {op-sit-o' -ke-ah) [bipe, late ; t6koc , birth] . 

 Abnormally long pregnancy. 



Opsomania {op-so-ma' -ne-ah) [btpov, dainty food ; fiavia, 

 mania]. Insane desire for dainty food, or for some 

 special food. 



Opsomaniac {op-so-ma' -ne-ak) [btyov, dainty food ; 

 fiavia, mania]. One affected with opsomania. 



Opsophagia {op-so-fa' '-je-ah) [bipov, dainty food ; 

 (payeiv, to eat]. Morbid daintiness in respect of food. 



Optactin {op-tak' -tin) [0-7-oc, visible; auric, ray]. The 

 visual axis. 



Optasioscopy {op-taz-e-os' -ko-pe) \bnracia, a vision ; 

 CKOTTtlv, to view]. The testing of retinal perception 

 without the action of light, but by pressure or electric- 

 ity, subjective sensations of light being produced. 



Optic, Optical {op'-tik, op'-tik-al) [otttlkoc, from birav, 

 to see]. Pertaining to vision or its organ, or to the 

 science of optics. O. Angle. See Angles, Table of. 

 O. Atrophy, atrophy of the optic nerve. See Atrophy. 

 O. Axis, the axis of the eye. O. Center, the point 

 in the main axis of the crystalline lens at which the 

 rays of light meet. Also applied to the nervous 

 center concerned in the visual function. O. Chiasm. 

 See Commissure, Optic. O. Commissure. See Com- 

 missure. O. Cup, the concave area formed by the 

 involution of the distal extremity of the primary 

 optic vesicle. O. Disc. See Disc. O. Foramen. 

 See Foramina, Table of. O. Groove, the groove on 

 the sphenoid bone for the optic chiasm. See Groove. 

 O. Lobes, the corpora quadrigemina. O. Nerve. See 

 Nerves. O. Neuritis. See Papillitis. O. Papilla. 

 See Disc, Optic. O. Radiations, the term given by 

 Gratiolet to the large fasciculus of nerve-fibers join- 

 ing the corona radiata of the optic thalamus and the 

 occipital lobe of the cerebrum. O. Section. See 

 Section. O. Stalk, a soft process on the head of mol- 

 luscs supporting an eye ; an ommatophore. O. Thal- 

 amus. See Thalamus. O. Tract. See Tract. 

 O. Vesicle, in embryology, a diverticulum from each 

 side of the primary anterior vesicle, which forms the 

 basis of the future eye. 



Optically {op'-tik-al-e) [otctik6<;, from bnav, to see]. In 

 accordance with the science of optics ; by optic 

 means. O. Active, a qualification applied to many 

 carbon compounds, liquid and solid, capable of rotating 

 the plane of polarized light. 



Optician {op-tish' -an) \oittik6q, from birav, to see]. A 

 maker of optic instruments. 



Opticist {op' -tis-ist) [bwrmde, from bnav, to see]. One 

 skilled in optics. 



Opticociliary {op-tik-o-sil' -e-a-re) [brrrindq, from bnav, 



to see; cilium, hair]. Pertaining to the optic and 

 ciliary nerves. 



Opticocinerea {op-tik-o-sin-e' -re-ah ) [b-irriKdc , from 

 b-av, to see; cinereus, resembling ashes]. The gray 

 matter of the optic lobes. 



Opticon {op'-tik-on) [oktmoc, seeing]. In biology, gan- 

 glionic swelling in optic nerve of insects. {Hitkson. 



Opticopupillary {op-tik-o-pu' '-pil-a-re) [otztikoc, from 

 drrav, to see ; pupilla, pupil]. Relating to the pupil 

 and the optic nerve. 



Optics {op'-tiks) [bnrinoc, from bnav, to see]. That 

 branch of physics treating of the laws of light, its n 

 fraction and reflection, and of its relation to vision. 

 See Dioptrics. 



Optimism {op' -tim-izm) \optimus, best]. Delusional 

 exaltation ; delirium of grandeur ; amenomania. 



Optimum {op' '-tim-um) \optimus, best]. In biology, 

 that temperature at which vital processes are carried 

 on with the greatest activity. Midway between the 

 minimum, or lowest endurable, and maximum, or high- 

 est endurable, temperatures. 



Optocele {op'-to-sel). See Paraqueduct. 



Optoeidometer {op-to-i-dom' -et-er) [o77r//c<5c , seeing ; 

 elSoc, like; fierpov, a measure]. An instrument for 

 testing the acuity of vision and the refraction of the eye. 



Optogram {op'-to-gram) [onroc, visible; ypa<j>eiv, to 

 write]. A faint image stamped on the retina for a 

 brief period after death, believed to be that of the 

 last object seen before death. 



Optograph {op'-to-graf). See Optogram. 



Optomeninx {op-to-men' -inks). Synonym of Retina. 



Optometer {op-tom'-et-er) [oTzrdc, visible ; fierpov, meas- 

 ure]. An instrument for facilitating the measurement 

 of the refraction of the eye. 



Optometry {op-torn' '-et-re) [bnrnr, visible ; fierpov, meas- 

 ure]. Measurement of the visual powers. 



Optoscope {op' -to-skbp) \bn~6c , seen ; oKa-elv, to in- 

 spect]. An instrument for testing unilateral amblyopia. 



Optostriate {op-to-stri' -at) [brrroq, visible ; stn 

 striped]. Pertaining to the optic thalami and the 

 corpora striata. O. Body, a thalamus and a striatum 

 considered as forming a unit. 



Optotype {op'-to-tlp) [bnroc, visible; tvttoc, type]. Aj 

 test-type used in testing the acuity of vision. 



Opuntia {o-pun' -te-ah) [opuntius, relating to 

 town of Greece]. Prickly pear; a genus of ca 

 ous plants represented by numerous species, ma 

 which, as O. reticulata and O. tuna, have slight me j 

 dicinal properties, the former being anthelmintic, pur 

 gative, and locally sedative; the latter has been use 

 for palpitation of the heart. Unof. 



Ora {o'-rah) [I-]. Margin. O. serrata, the sei 

 endings of the zonule of Zinn, or ligament o 

 lens, and the retina. 



Orad {o'-rad) \os, oris, mouth]. Toward the mouth. I 

 the oral region. 



Oral {o'-ral) [os, oris, the mouth]. In biology, si' 

 on the same side as the mouth; actinal ; oppo 

 aboral, abortinal, anal. O. Catarrh. Synonyi 

 Stomatitis catarrhal is. O. Whiff. See Whiff. 



Orange {or'-anj). See Aurantium and Pigment 

 spectus of. 0. Colors. See Pigments, 

 O. -grass, a small North American plant, llvr 

 sarothra ; pineweed ; a popular remedy foi 

 catarrhs. Unof. O. Minium. Same as M 

 O. Ocher. Same as Ochcr. O.-peas : I. The 

 of the orange dried and used for issue -peas. 2. Sim 

 unripe dried oranges, used in the flavoring of liqu 

 O. Sarcina. See Sarcina. O.-skin, 

 tinge of the skin observed in newly-born infants. 



Orangeade {or-anj-ad') [ME., orenge, orange]. 

 drink made of orange-juice and sweetened water. 



