OBO- 



212 



OCT- 



obovate (obo'vat) a. [L. ob, reversely ; 

 ovum, an egg.] Egg-shaped, with 

 the narrow end attached to the 

 stalk (tot.). 



obovoid (obo'void) a. [L. ob, against ; 

 ovum, an egg ; Gk. eidos, shape.] 

 Inversely ovoid ; roughly egg- 

 shaped, with the narrow end down- 

 wards (bot.). 



obsolescence (obsoles'ens) n. [L. 

 obsolescere, to wear out.] The 

 gradual reduction and consequent 

 disappearance of anorganism (biol.) ; 

 a blurred portion of a marking on 

 any animal (zoo/.). 



obsolete (ob'solet) a. [L. obsolescere, 

 to wear out.] Wearing out or dis- 

 appearing ; appl. any character that 

 is becoming less and less distinct 

 in each succeeding generation 

 (biol.). 



obturator (ob'tura'tor) a. [L. obturare, 



to close.] Pert, any structure in 



the neighbourhood of the obturator 



foramen (anaf.). 



obturator foramen, an oval foramen 



between ischium and pubis (zoo/.). 

 obtusilingual (obtusiling'gwal) a. [L. 

 obtundere, to make blunt ; lingua, 

 a tongue.] Short-tongued (zoo/.). 

 obumbrate (obum'brat) a. [L. 

 obumbrare, to overshadow.] With 

 some structure overhanging the 

 part so as to conceal it partially 

 (zoo/.). 



obverse (ob'vers, obvers') a. [L. 

 obvertere, to turn round.] With 

 the base narrower than the apex 

 (bot.}. 



obvolute (ob'volut) a. [L. obvolvere, 

 to wrap round.] Overlapping ; 

 appl. leaves when half of one leaf 

 is wrapped round half of another 

 similar leaf (bot.). 



obvolvent (obvol'vent) a. [L. 

 obvolvere, to wrap round.] Bent 

 downwards and inwards ; appl. 

 wings, elytra of insects, etc. (zoo/.). 

 occipital (oksip'ital) a. [L. occiput, 

 back of the head.] Pert, the back 

 part of the head or the occipital 

 bones (anaf., zoo/.). 

 occipitalia (ok'sipita'lia) n. plu. [L. 

 occiput, back of the head.] The 

 group of parts of the cartilaginous 

 brain case forming the back part 

 of the head (zoo/.). 



occiput (ok'sipoot, ok'sipiit) . [L. 

 occiput, back of the head.] The 

 occipital region of the skull 

 (anaf.) ; the back of an insect's 

 head (zoo!.). 



occlude (oklood') v. [L. occluderc, 

 to shut in.] To absorb (phys.}. 



occlusor (okloo'sor) a. [L. occludere, 

 to shut in.] Appl. muscles of an 

 operculum or movable lid (zoo/.). 



ocellate (b'sel'at) a. [L. ocellus, a 

 little eye.] Like an eye or eyes ; 

 appl. markings on many animals 

 (zoo/.). 



ocellated (osel'ated, os'elated) a. [L. 

 ocellus, a little eye.] Having ocelli ; 

 having eye-like spots or markings 

 (zoo/.). 



ocellation (os'ela'shun) ;/. [L. ocellus, 

 a little eye.] Condition of having 

 ocelli, or of having ocellate mark- 

 ings ; ocellate marking (zoo/.). 



ocelli ferous (os'elif'erus) a. [L. 

 ocellus, a little eye ; ferre, to bear.] 

 Ocellated, which see. 



ocellus (osel'us) ., ocelli (osel'i, 

 osel'e) plu. [L. ocellus, a little 

 eye.] A simple single eye or eye- 

 spot found in many of the lower 

 animals ; an eye-like marking as 

 seen in many Insects (zoo/.). 



ochrea, ocrea (ok'rea, o'krea) n. [L. 

 ocrea, a greave.] A tubular sheath - 

 like expansion at the base of the 

 petiole (bot.} ; a sheath (zoo/.). 



ocreaceous (ok'rea'shus) a. [L. ocrea, 

 agreave.] Ocrea-like; appl. various 

 structures in plants and animals. 



ocreate (ok'reat) a. [L. ocrea, a 

 greave.] Having an ocrea (bot.} ; 

 booted, sheathed (zoo/.). 



octactine (oktak'tin) n. [Gk. okta, 

 eight ; aktis, a ray.] A type of 

 sponge spicule with eight rays, a 

 modification of a hexactine (zoo/.). 



octamerous (oktam'eriis) a. [Gk. 

 okta, eight ; meros, a part.] Appl. 

 organs or parts of organs when 

 arranged in eights ; appl. parts of 

 whorls of certain plants (bot.} ; 

 appl. parts of certain Alcyonaria 

 (zoo/.). 



octandrous (oktan'drus) a. [Gk. okta, 

 eight ; aner, a man.] Having eight 

 stamens (bot.}. 



octant (ok'tant) n. [L. octo, eight.] 

 One of the eight cells formed by 



