OVATE 



ikive condition of the sexual apparatus, the phylo- 

 ;nic and ontogenic precursor of sexual differentiation, 

 t-hich is effected by the abortion or reduction of one 

 iind of sexual apparatus and function taking place at 

 rery different stages in the organism, and often when 

 le sexual organs have attained a very high degree of 

 specialization, the human ovary becoming histologi- 

 illy recognizable about the sixth week, and readily 

 listinguished in a three-months embryo. 2. That 

 of the pistil of a flower which produces and con- 

 the ovules and seeds. The ovarium or ger- 

 tartum. O., Irritable, an ovary the seat of inter- 

 mittent neuralgic pain. 

 Ovate [(/-vat) (ova/us, egg-shaped]. Egg-shaped. 

 Oven (ui/-n) [oven, an oven]. An apparatus used in 

 bacteriologic laboratories for sterilizing culture-media, 

 for maintaining the cultures, etc., at a constant temper- 

 ture by an automatic mechanism. Those of Koch, 

 3 asteur. d' Arson val, and Babes are most used. 



(o'-ver) [ME., over, over]. In a place higher 

 lan a given object. O. -crowding, the dwelling to- 

 gether of too many persons in a locality, house, or 

 apartment, with the consequent failure in sanitary and 

 lygienic arrangements, whence result conditions favor- 

 able to the development and spread of certain diseases, 

 -eat, to surfeit with eating. O.-feed, to feed to 

 excess. O. -grown, grown too large. O. -laid, said of 

 child suffocated by the parent lying on it. O. -lying 

 jf Children, a frequent cause of death in infants from 

 iffocation from one of the parents lying upon the 

 child while in an intoxicated condition or intention- 

 lly. O. -maximal, beyond the normal maximum, as 

 over-maximal contraction of a muscle. (Fick.) 

 -pressure, applied chiefly to the school-system that 

 forces too long and continuous periods of study upon 

 le pupils, with consequent unhealthy conditions of 

 iind and body. O. -reach, to strike the toe of the 

 ind-foot against the heel or shoe of the fore-foot ; said 

 af a horse. O. -riding, overlapping of the broken 

 ends of a fractured bone. O. -sight. See Hyperme- 

 tropia. O.- strain, to strain to excess; a condition 

 re-ulting from exhausting effort. O.-toe, a variety of 

 Hallux varus in which the great toe overlies its fellows. 

 O. -tones, the notes represented by the vibrating sub- 

 divisions of a string ; harmonics. O.-work, Mental. 

 See Parathymia. 

 Ovic [o'-vik) [$>v, ovum, an egg]. Relating to an ovum. 



0. Cell, in biology, a primitive ovum (the Urei of 

 German authors). Primitive ova exist in great num- 

 bers in cord-like ingrowths of the epithelium of the 

 ovary [Pfluger 1 schen Schlauche) in which each ovic cell 

 finally becomes surrounded by a separate envelop of 

 epithelial cells, forming the primordial follicle. 



Ovicapsule (o-vik-ap'-siil) [ww, ovum, egg; capsula, 



capsule]. An egg-case, ovisac, or Graafian follicle. 

 Ovicell (o'-vis-el) [<J6i', ovum, an egg; cella, a cell]. 



1. An unimpregnated ovum. 2. Same as Ovicyst. 

 Ovicyst i / -vis-ist )\imv , ovum, an egg ; avorir, a pouch]. 



In biology, the incubatory pouch of an ascidian or 



polyzoan. 

 Ovicystic (o-vis-is'-tik) \_<j6i>, ovum, an egg ; Kiarir, a 



bladder]. Pertaining to an ovicyst. 

 Oviducal (o-vid-u'-kal), Oviducent (o-ve-du' -sent) 

 . ovum, egg; ducere, to lead]. Pertaining to the 



oviduct, or its functions. O. Gland, an enlargement 



of the oviduct in Sepia. 

 Oviduct ((/ -vid-nkt) \dm>,ovum, egg; ductus, a canal]. 



The Fallopian tube ; a small tube upon either side of 



the uterus through which the ovule passes to the uterus. 



O., Ampulla of, O., Pavilion of, the expanded 



portion of the abdominal end of the oviduct, the 



fringed edge of which is called the fimbria. 



953 OVOPLASM 



Oviferous (o-vif'-er-us) \$6v, ovum, an egg ; ferre, to 

 bear]. In biology, bearing eggs or ova. 



Ovification (o-vif-ik-a' -shun) \uov, ovum, egg ; facere, 

 to make]. The production of ova. 



Oviform [o'-vif-orm) [<Ajr, ovum, egg; forma, form]. 

 Egg-shaped; oval. 



Ovigenous (o-z-if -en-us) [C>6v,oz'um, egg; }£vi/c, pro- 

 ducing]. Producing ova, as an ovary. O. Layer, the 

 outer layer of the ovary, in which the ovisacs contain- 

 ing the ova are situated. 



Ovigerm (o' -vij-erm) [dov, ovum, an egg ; germen, 

 sprout, bud]. In biology, an ovum, or ovicell. 



Ovigerous [o-z-ij'-er-us) [tiw, ovum, egg ; gerere, to 

 carry]. Producing eggs or ova ; oviferous, ovigenous, 

 oviparous. 



Ovination (o-vin-a'-shun) \ovis, a sheep]. Inoculation 

 with the virus of sheep-pox. It has been employed 

 like equination and Pasteurism, as a substitute for 

 vaccination. 



Oviparous (o-vip / -ar-us) [wov, ovum, egg; parere, to 

 bring forth]. Producing, or laying, eggs ; a term ap- 

 plied to those species of animals, the females of which 

 bring forth their young in the egg-stage of develop- 

 ment; incubated outside the body, as distinguished 

 from ovaviviparous , or viviparous. 



Oviposit (o-vip-oz f -it) \&ov, ovum, an egg; positus, p.p. 

 of ponere, lay]. In biology, to lay or deposit eggs, 

 especially with an ovipositor, as an insect. 



Oviposition (o-vip-o-zish' '-««) [ww, ovum, egg ; ponere, 

 to place]. In biology, the act of laying or deposit- 

 ing eggs by the females of oviparous animals. 



Ovipositor (o-vip-oz' -it-or) [oir>r, oz-um, egg; positor, 

 builder]. In biology, an organ, common among 

 insects, composed of several modified rings or somites, 

 forming the end of the abdomen, and employed in de- 

 positing the eggs in places fit for development. 



Ovis (/-;•») [L.]. Sheep. 



Ovisac {(/-vis-ak) [«iov, ovum, egg; saccus, sack]. In 

 biology, the capsule, sac, cyst, case, cell, or pod of an 

 individual ovum ; a Graafian follicle, an ovicell, ovi- 

 cyst, ovicapsule. 



Oviscapt [o'-vis-kapf) [tVSv , oz'um , an egg; GKarrreiv, to 

 dig]. Same as Ovipositor. 



Ovism (o'-vizm) \jmv, ovum, egg]. The doctrine that 

 the ovum encloses within itself in an undeveloped form 

 all the organs of the future being ; the doctrine of 

 incasement, q. v. 



Ovispermary (o-vis-per* '-mar-e) [cjov, ovum, an egg ; 

 spermarium, spermary]. In biology, an ovotestis or 

 sexual organ producing both ova and spermatozoa. 



Ovist (o f -vist) [txn 1 , ovum, egg]. In biology, an ad- 

 herent of the doctrine of incasement, q. v. ; an ovulist. 



Ovoblast (o'-vo-blast) \j$n>, ovum, ovum ; t i/.naroc, 

 germ]. The primordial ovum. 



Ovococcus (o-vo-kok / -us) \_d6v, ovum, egg ; kokkoc, 

 berry: pi. , Oi'ococci\ In biology, the nucleus of the 

 ovicell, or unimpregnated ovum. 



Ovogenesis (o-vo-jen' -es-is) [<mv, ovum, egg; yh-eatc, 

 genesis]. The process of the development or pro- 

 duction of the ovum. 



Ovogenetic (o-vo-jen- et'-ifc) [&5or, oz'um, egg ; --ewav, 

 to beget]. Pertaining to ovogenesis. 



Ovogenous (o-vof -en-us). Synonym of Ovogenetic. 



Ovoid (o / -7'oid) \_(J6i', ovum, egg; eldoc. like]. Egg- 

 shaped. O., Fetal, the fetal ellipse, or the ellipse 

 formed by the bending of the fetal body in utero. 



Ovolemma (o-vo-lem'-ah) \$6v, oz'um, egg; /J una, 

 bark] . The membrane surrounding the yolk of the 

 human egg. 



Ovology (o-vol'-o-je) [(J6v, ovum, egg; XSyof, science]. 

 Same as Oology. 



Ovoplasm (o' ' -vo-plazm) \jJ6v, ovum, egg ; Tr/Ao/ia, 



