OVA- 



221 



OXY- 



ovate -oblong, having an oblong 

 lamina with one end narrower than 

 the other (bot.). 



ovenchyma (ovgng'klma) n. [L. 

 ovum, egg ; Gk. engchyma, in- 

 fusion.] A connective tissue with 

 ovoid-shaped cells (smb.}. 



ovicell (o'vIsSl) n. [L. ovum, egg ; 

 cellula, a cell.] A dilatation of the 

 zooecium, serving as a brood pouch 

 (zool.). 



oviduct (6'vldukt) n. [L. ovum, egg ; 

 ducere, to lead.] The tube which 

 carries the eggs from the ovary to 

 the exterior ; the Miillerian duct ; 

 the tube may or may not be 

 attached to the ovary (zool.). 



oviferous (ovif'e'rus) a. [L. ovum, 

 egg ; ferre, to carry.] Serving to 

 carry the eggs (zool.). 



oviform (o'viform) a. [L. ovum, Qgg ; 

 forma, shape.] Egg-shaped. 



oviparity (6'vipar'itl) n. [L. ovum, 

 egg ; parere, to bring forth.] Con- 

 dition of being oviparous (zoo/.). 



oviparous (ovip'arus) a. [L. ovum, 

 egg ; parere, to bring forth.] Pro- 

 ducing eggs : egg-laying ; cf. vivi- 

 parous (zool.). 



oviposit (6'vipoz'it) v. [L. ovum, 

 egg ; ponere, to place.] To lay 

 eggs ; appl. Insects (zool.). 



ovipositor (o'vipoz'itSr) n. [L. ovum, 

 egg ; ponere, to place.] A special- 

 ized structure in Insects for placing 

 the eggs in a suitable place ; a 

 tubular extension of the genital 

 orifice in Fishes (zool.). 



ovisac (6'visak) n. [L. ovum, egg ; 

 saccus, a bag.] An egg-capsule 

 (zoo!.). 



ovism (6'vizm) n. [L. OVUM, egg.] 

 The theory held by the Ovists that 

 the egg contained the germ with 

 the germs of all future generations 

 within it (biol.). 



ovist (6'vTst) n. [L. ovum, egg.] A 

 supporter of the Ovism theory (biol.). 



ovocentre (o'vosSn'ter) n. [L. ovum, 

 egg ; centrum, a centre.] The egg- 

 centrosome during fertilization 

 (emb.). 



ovogenesis (o'vbjen'e'sis) n. [L. ovum, 

 egg ; Gk.. genesis, descent.] Oogen- 

 esis, which see. 



ovoid (o'void) a. [L. ovum, egg ; Gk. 

 cidos, form.] Egg-shaped. 



ovomucoid (o'vomu'koid) n. [L. 

 ovum, egg ; mucus, mucus ; Gk. 

 eidos, form.] A mucoid found in 

 eggs (pkys.). 



ovotestis (o'votgs'tis) n. [L. ovum, 

 egg; testis, testicle.] The her- 

 maphroditic reproductive gland of 

 certain Gastropods (zoo/.). 



ovoviviparous (6'vovivip'arus) a. [L. 

 ovum, egg ; vivus, living ; parere, 

 to bring forth.] Pert, forms which 

 produce an egg with a definite 

 shell, which yet hatch out internally 

 (zool.). 



ovulate (ov'ulat) a. [L. ovum, egg.] 

 Containing an egg or ovule (hot., 

 zool.). 



ovule (6'vul) n. [L. ovum, egg.] The 

 megasporangium of a seed-plant 

 (bot.) ; any small egg or egg-like 

 structure (zool.). 



ovuliferous (o'vullfgrus) a. [L. ovum, 

 egg ; ferre, to carry.] Ovule- 

 producing ; containing ovules (bot.). 



ovuliferous scales, stout scales, 

 each bearing two ovules, developed 

 on bract scales (bot.). 



ovum (6'vum) n. [L. ovum, egg.] 

 A female germ cell (biol.). 



oxea (ok'sea) n. [Gk. oxys, sharp.] 

 A sponge spicule, rod-shaped and 

 sharp at both ends (zool.). 



oxeote (ok'seot) a. [Gk. oxys, sharp.] 

 Like an oxea ; in the iform of a 

 simple rod ; appl. sponge spicules 

 (zool.). 



oxidize, oxydize. 



oxyaster (6k'sias'ter) n. [Gk. oxys, 

 sharp ; aster, a star.] A stellate 

 sponge spicule with sharp-pointed 

 rays (zool.). 



oxychromatin (ok'slkro'mattn) . 

 [Gk. oxys, sharp ; chroma, colour.] 

 Linin (emb.). 



oxydactyl (ok'stdak'tll) a. [Gk. oxys, 

 sharp ; daktylos, a finger.] Havmg 

 slender tapering digits (zool.). 



oxydase (6k stdas) n. [Gk. oxys, sour.] 

 An enzyme which promotes oxy- 

 dation (phys.). 



oxydiact (ok'sldfakt) a. [Gk. oxys, 

 sharp ; di, two ; aktis, ray.] Having 

 three rays of which only two are 

 fully developed ; appl. sponge 

 spicules (zool.). 



oxydize (ok'sidlz) v. [Gk. oxys, acid.] 

 To combine with more oxygen ; to 



