PRO- 



256 



PRO- 



anteriorly directed process from 

 the glenoid fossa of Urodeles (zool.). 



procryptic (prokrlp'tik) a. [Gk. pro, 

 for ; kryptos, hidden.] With colora- 

 tion adapted for concealment (zoo/.). 



proctal (prok'tal) a. [Gk. proktos, 

 anus.] Anal ; appl. fish fins 

 (zool.). 



proctodaeum (prok'tode'um) n. [Gk. 

 proktos, anus ; odos, a way.] The 

 latter part of the embryonic ali- 

 mentary canal ; formed by anal 

 invagination ; a similar ectoderm- 

 lined part in certain invertebrates 

 (zool.). 



procumbent (pr5kum'bent) a. [L. 

 pro, forward ; cumbens, lying down.] 

 Prostrate ; trailing on the ground ; 

 appl. stems (bot.). 



prodentine (proden'tin) n. [L. pro, 

 before ; dens, tooth.] A layer of 

 uncalcified matrix capping tooth 

 cusps before the formation of dentine 

 (anat.). 



proembryo (progm'brio) n. [Gk. pro, 

 for ; embryon, a foetus.] An embry- 

 onic structure preceding the true 

 embryo ; the first results of spore 

 segmentation (hot.). 



progamete (pro'gamet') n. [Gk. pro, 

 before ; gamos, union.] A structure 

 giving rise to gametes by abstriction, 

 in certain Fungi (bot.). 



progamic (progam'ik) a. [Gk. pro, 

 before ; gamos, union.] Appl. 

 brood-division for gamete produc- 

 tion (zool.). 



progeotropism (pro'jeot'ropizm) n. 

 [Gk. pro, for ; ge, earth ; trope, a 

 turning.] Positive geotropism (&?/.). 



proglottides (prSglot'idez) n. plu. 

 [Gk. pro, for ; glotta, tongue.] The 

 propagative body-segments of a 

 tapeworm, formed by stabilization 

 from the neck (zool.) ; sing, pro- 

 glottis. 



prognathous (prognath'us) a. [Gk. 

 pro, forth ; gnathos, jaw.] Having 

 prominent or projecting jaws. 



prohydrotropism (pro'hidrot'ropizm) 

 n. [Gk. pro, for ; hydor, water ; 

 trope, a turning.] Positive hydro- 

 tropism (oof.). 



projectile (prqjeVtil) a. [L. pro, 

 forth ; jacere, to throw.] Protrus- 

 ible ; that can be thrust forward 

 (zool.). 



projection (projek'shiin) n. [L. pro, 

 forth ; jacere, to throw.] The 

 referring of stimulations to end- 

 organs of sense by means of the 

 connecting projection nerve-fibres 

 (Phys.). 



proleg (pro'leg) n. [L. pro, for ; 

 M.E. leg, a leg.] An unjointed 

 abdominal appendage of arthropod 

 larvae (zool.). 



proliferate (prolif'erat) v. [L. proles, 

 offspring ; ferre, to bear.] To re- 

 produce repeatedly (biol.). 



proliferation (prolif'era'shun) n. [L. 

 proles, offspring ; ferre, to bear.] 

 Prolification ; increase by frequent 

 and repeated reproduction of any 

 kind (biol.). 



proliferous (prolif'erus) a. [L. proles, 

 offspring ; ferre, to bear.] Multiply 

 ing quickly (biol.) ; appl. bud-bearing 

 leaves ; developing supernumerary 

 parts abnormally (bot.). 



promitosis (pro'mitd'sis) n. [Gk. pro, 

 for ; mitos, thread.] A simple type 

 of mitosis exemplified in nuclei of 

 protokaryon type (cyt.). 



promontory (prom'ontorl) n. [L. pro, 

 forth ; mons, mountain.] A prom- 

 inence or projection, as of the 

 cochlea (anat.). 



promorphology (pro'morfol'oji) n. 

 [Gk. pro, for ; morphe, form ; logos, 

 discourse.] Morphology from the 

 geometrical standpoint. 



promuscis (promus'is) n. [L. pro- 

 muscis, a proboscis.] The proboscis 

 of Hemiptera (zoo/.). 



promycelium (pro'mlse'Hum) n. [Gk. 

 pro, for ; mykes, mushroom.] The 

 mycelium developed from a zygo- 

 spore, itself giving rise to a spor- 

 angium (bot.),_ 



pronate (pro'nat) a. [L. pronare, to 

 bend forward.] Prone ; inclined 

 (biol.). 



pronation (prona'shun) n. [L. pronare, 

 to bend forward.] The act by which 

 the palm of the hand is turned 

 downwards by means of pronator 

 muscles ; cf. supination (phys.). 



pronephric (pronef'rik) a. [Gk. pro, 

 before ; nephros, kidney.] Pert, or 

 in the region of the pronephros ; 

 appl. duct, tubules (emb.). 



pronephros (pronef'ros) n. \Gk.pro, 

 before ; nephros, kidney.] The 



