OBTURATOR 



OCHLOPHOBIA 



The state of being obtunded, or dulled ; diminished 

 sensibility. 



Obturator [ob'-tu-ra-tor) [obturator ; obturare, to stop 

 up]. That which closes a cavity. In surgery, an 

 instrument for closing an opening caused by a wound or 

 by disease. O. Artery. See Arteries, Table of . O., 

 Dental, an instrument used in the treatment of pala- 

 tine defect when operative surgical means are not 

 applicable. O. Foramen, a foramen in the anterior part 

 of the os innominatum. See Foramina, Table of. 

 O. Muscle. See Muscles, Table of O. Nerve. See 

 Nerves, Table of. 



Obturbinate [ob-ter'-bin-dt) [ob, reversed; turbo, a 

 top]. In biology, top-shaped, with the apex or peg- 

 end up. 



Obtuse [ob-tus') [obtusus, p. p. of obtundere, to blunt, 

 dull]. Blunt. 



Obtusifolious [ob-tu-sif-o' -le-us) [obtusus, blunted ; 

 folium, leaf]. In biology, having blunt leaves. 



Obtusilobous [ob-tu-sil-o' -bus) [obtusus, blunted ; lobus, 

 a lobe]. In biology, having leaves with obtuse lobes. 



Obtusion [ob-tu' '-zhuti) [obtundere, to blunt]. The 

 blunting or weakening of the normal sharpness or 

 strength of sensation ; a symptom of certain diseases. 



Obumbrant [ob-um' '-brant) [ob, over; umbrare, to 

 shadow, shade]. In biology, overhanging. 



Obumbrate [ob-um'-brdt) [ob, over; umbrare, to shad- 

 ow]. In biology, situated under an overhanging part. 



Obuncous [ob-ung'-kus) [ob, against ; uncus, bent in, 

 hooked]. In biology, very crooked or hooked. 



Obvallate {pb-val'-df) [obvallare, to surround with a 

 wall]. In biology, walled in. 



Obvolute [ob'-vo-lut) [obvolvere, to wrap]. In biology, 

 the term applied to that form of vernation in which 

 half of one leaf covers half of another ; half-equitant. 



Obvolvent [ob -vol' -vent) [obvolvere, to wrap]. In bi- 

 ology, curved downward or inward. 



Occipital [ok-sip' -it-al) [occipitalis, occipital]. Per- 

 taining to the occiput. O. Artery. See Arteries, 

 Table of. O. Bone, the bone of the skull situated at 

 its posterior, middle, and inferior part. See Bones, 

 Table of. O. Crest. See Crest. O. Fossa. See Fossa. 

 O. Lobe. See Lobe. O. Nerve. See Nerves, Table 

 of. O. Points. See Cr v? niometric Points. O. Pro- 

 tuberance, the prominence on the inner surface [in- 

 ternal) or on the outer surface [external) of the occi- 

 pital bone. O. Sinus. See Sinus. O. Triangle. See 

 Triangles, Table of O. Vertebra, the occipital bone, 

 in the vertebral theory of the skull. 



Occipiten [ok-sip' -it-en) [occiput, occiput]. Belong- 

 ing to the occipital bone in itself. 



Occipito- [ok-sip' -it- o-) [occiput, occiput]. A prefix to 

 denote connection with or relation to the occipital 

 bone. O.-atloidean, pertaining conjointly to the 

 occipital bone and the atlas. O.-axoid, or O. -axial, 

 pertaining to both the occipital bone and the axis, or 

 second vertebra. O.-bregmatic, pertaining conjointly 

 to the occipital bone and the bregma. O. -cotyloid, 

 in obstetrics, a term applied to a condition in which 

 the fetus has the occiput directed toward the acetabu- 

 lum of the mother. O. -frontal, both occipital and 

 frontal. O. -frontal Triangle. See Triangle. O.- 

 frontalis. See Muscles, Table of. O. -mastoid, 

 relating to the occiput and the mastoid process. 

 O. -mental, pertaining to chin and occiput. O.- 

 odontoid, pertaining to the occipital bone and the 

 odontoid process of the axis. O. -parietal, pertaining 

 conjointly tc the occipital and parietal bones of the 

 head. O. -posterior, in obstetrics, a term applied to 

 the condition in which the fetus has the head directed 

 toward the mother's sacrum. O. -sacral. Synonym 

 of 0. -posterior. O. -sternal Triangle. See Triangle. 



O. -temporal, pertaining to the occiput and th< 

 temples. 



Occiput [ok'-sip-ut) [ob, against ; caput, the head : gen 

 Occipitis : pi., Occipita\ The back part of the head. 



Occludent [ok-lu' -dent) [occludere, to shut up]. In bi 

 ology, applied to parts that shut up or close. 



Occlusio [ok-lu' -ze-o) [L.]. Closure. O. pupilla 

 obliteration of the pupil. O. pupillae lymphatica, 

 obliteration of the pupil by a false membrane. 



Occlusion [ok-lu' shun) [occlusio; occludere, to shui 

 up]. I. A closure, blocking or shutting up of a normalh 

 patent aperture, as of the anus or ear. A synonym of 

 Imperforation and Obstruction. 2. In chemistry, the 

 absorption by a metal, of gas in large quantities, as of 

 hydrogen by platinum. 3. The full meeting of the 

 masticating surfaces of the upper and lower teeth, in 

 the position of rest. 



Occlusive [ok-lu'-ziv) [occludere, to shut up]. Effect- 

 ing an occlusion, as an occlusive dressing, in sur- 

 gery. 



Occlusor [ok-lu' -zor) [occludere, p. p. occlusus, to close 

 up: pl.,Occlusores\ In biology, an organ that closes 

 an opening ; or draws parts together. 



Occult [ok-kult') [occultus, hidden]. Hidden ; con- 

 cealed ; not evident. O. disease, any disease the 

 nature of which is not readily determined. 



Occupation-diseases. Those caused by or connected 

 with the occupation of the patient, divisible into :— 



a. Irritant, mechanic or chemic effects of materials: 



b. Toxic, from poisonous matter absorbed into the 

 blood : and c. Fatigue, as in scrivener's palsy. 0. 

 neurosis, a neurosis occasioned by one's employment 

 or trade, as writer's cramp. See, also, Anapeiratic. 



Ocellar [o-sel'-ar) [ocellus, a little eye]. In biology. 



pertaining to ocelli. 

 Ocellatae [os-el-at' -e) [ocellus, a little eye]. In biology. 



the marginal vesicles in the Leptomedusce . Cf. 1 



cyst. 

 Ocellate [os'-el-dl) [ocellatus, having little eyes]. In 



biology, same as ocellated ; having a colored patch like 



an eye, e.g., certain feathers, flowers, butterflies' 



wings, or fishes' fins. 

 Ocellated [os'-el-a-ted) [ocellus, a little eye]. Resem- 

 bling or having eyes. 

 Ocelli [o-sel'-i) [ocellus, dim. of oculus, an eye]. Thej 



simple eyes of insects. 

 Ocelliferous [os-el-if -er-us) [ocellus, a little eye; ferre,\ 



to bear] . Same as Ocellate. 

 Ocelligerous [os-el-if -er-us) [ocellus, little eyes ; s 



to carry]. Same as Ocellate. 

 Ocellus [o-sel'-us) [a little eye: //., Ocelli"]. 



ology : [a) one of the simple eyes or pigments) 



invertebrate animals. Cf. Stemmatus ; [b) one 1 



elements of a compound eye ; [c) one of the ci 



spots on many feathers, flowers, etc. 

 Ochema [ok-e'-mah) [oj^/m, from bx&v, to cairy]. A 



vehicle for medicines. 

 Ocher, Ochre [o'-ker) [tjxpdt;, pale yellow]. A 



given to clay variously colored by the oxids ol 



See Pigments, Conspectus of. 0. -colored Stools 



a descriptive term applied to the dejecta of ty] 



fever patients. 

 Ocherous, Ochreous [o'-kcr-us, o'-kre-us) [< 



pale, wan]. In biology, brownish-yellow. 

 Ocheus [ok'-e-us) [o^elv, to carry]. The scrotum. 

 Ochlesis [ok-le'-sis) [6;r/.oc, crowd]. Crowd] 



ing ; disease due to over-crowding, and lack of v< 



tion. 

 Ochletic [ok-lel'-ik) [5,-f/loc, crowd]. Pertaining 



of the nature of, ochlesis. 

 Ochlophobia [ok-lo-fo'-be-ah) [bx>Mq, crowd; ^"f 



fear]. Morbid dread of crowds. 



