POS- 



252 



PRA- 



processes of the pubis parallel to 

 the ischium (zool.}. 



postpyramidal (post'piram'Tdal) a. 

 [L. post, after ; pyramis, pyramid.] 

 Behind the pyramid ; appl. a cere- 

 bellar fissure (anat.}. 



postscutellum (post'skuteTum) n. 

 [L. post, after ; scutellum, a small 

 shield.] A projection under the 

 mesoscutellar lobe of Insects, the 

 base of the mesophragma (zool.}. 



postsphenoid (postsfe'noid) n. [L. 

 Post, after ; Gk. sphen, wedge.] The 

 posterior part of the sphenoid 

 (emb.}. 



post-temporal (post-tSm'poral) a. [L. 

 post, after ; temporalis, temporary.] 

 Behind the temporal bone ; appl. 

 bone and fossa (anat.}. 



post-trematic (p5st-tremat'lk) a. [L. 

 post, after ; Gk. trema, a hole.] 

 Appl. nerves running in the 

 posterior wall of the first gill cleft 

 to the pharynx (zool.}. 



postzygapophysis (post'zlg&pof'isis) n. 

 [L. post, after ; Gk. zygon, yoke ; 

 apo, from ; physis, growth.] An 

 articular process on the posterior 

 face of the neural arch for articula- 

 tion with the succeeding vertebra 

 (anat.}. 



potential (potgn'sh&l) a. [L. potens, 

 powerful.] Latent, as appl. char- 

 acteristics (biol.}. 



pouch (powch) n. [O.Y.pouche, bag.] 

 A bag-like structure ; a sac or 

 bladder, as the pharyngeal pouches 

 (emb.} ; a marsupial pouch (zool.} 

 a pod (bot.}. 



powder-down feathers, those which 

 do not develop beyond the early 

 stage, and which disintegrate at 

 the tip into powder (zool.}. 



praeabdomen (pra'-, pre'abdo'mgn) n. 

 [L. prae, before ; abdomen, belly.] 

 The anterior, broader part of the 

 abdomen of Scorpions (zool.}. 



praeauricular (pra'-, pre'orik'ular) a. 

 [L. prae, before ; auricula, a small 

 ear.] Appl. a sulcus at the anterior 

 part of the auricular surface of the 

 hip-bone (anat.}. 



praeaxial (pra-, preak'sial) a. [L. 

 prae, before ; axis, axle.] On the 

 anterior border or surface. 



praecentrum (pra-, presen'trum) n. 

 [L. prae, before ; centrum, centre.] 



The anterior part of the vertebral 

 centrum of certain lower vertebrates 

 (zool.}. 



praecoces (pra-, preko'sez) n. phi. 

 [L. prae, before ; coquere, to cook.] 

 Newly-hatched birds able to take 

 care of themselves ; cf. altrices 

 (zool.}. 



praecostal (pra-, prekos'tal) a. [L. 

 prae, before ; costa, rib.] Appl. 

 short spurs on the basal portion of 

 the hind wing of Lepidoptera (zool.}. 



praecmral (pra-, prekroor'al) a. [L. 

 prae, before ; crus, leg.] On the 

 anterior side of leg or thigh (anat.}. 



praecuneus (pra-, preku'neus) n. [L. 

 prae, before ; cuneus, wedge.] The 

 quadrate lobe of the cerebrum 

 (anat.}. 



praemaxilla (pra'-, pre'maksil'a) n. 

 [L. prae, before ; maxilla, jaw.] 

 The anterior portion of the upper 

 jaw ; the os incisivum (anat.}. 



praemorse (pra'-, pre'mors) a. [L. 

 praemorsus, bitten off.] With 

 irregular and abrupt termination, 

 as if bitten off (bot.}. 



praeoccipital (pra'-, pre'oksip'Ttal) a. 

 [L. prae, before ; occiput,, back of 

 the head.] Appl. an indentation 

 or notch anterior to the occipital 

 pole of the cerebral hemispheres 

 (anat.}. 



praeoral (pra-, preo'ral) a. [L. prae, 

 before ; os, mouth.] Pert, the part 

 of the body of a larva anterior to 

 the mouth ; appl. process, loop, 

 lobe, ciliated rings (zool.}. 



praepubic (pra-, prepu'bik) a. [L. 

 prae, before ; pubes, mature.] On 

 the anterior part of the pubis : 

 appl. the elongated processes of 

 the pubis of certain vertebrates 

 (zool.}. 



praepuce (pra'-, pre'pus) n. [L. prae- 

 putium, the foreskin.] That part 

 of the integument of the penis 

 which leaves the surface at the 

 neck and becomes folded upon 

 itself; the foreskin. 



praeputial (pra-, prepu'shtal) a. [L. 

 praeputium, the foreskin.] Pert. 

 the praepuce ; appl. glands, sac 

 (anat.}. 



praeputium, the praepuce. 



praescutum (pra-, presku'tum) n. 

 [L. prae, before ; scutum, shield.] 



