PRO- 
anteriorly directed process from 
the glenoid fossa of Urodeles _ 
procryptic — a. [Gk. 
for; krypios, hidden.}| With ro 
tion ada 
ted for concealment (zoo/.). 
proctal (proék’tal) a [Gk. prokios, 
anus.| Anal; afi. fish fins 
(zool.). 
proctodaeum (prék’tédé’iim) 7. [Gk. 
proktos, anus 
invagination ; a similar ectoderm- 
lined _— in certain invertebrates 
(zool. 
rocumbent (prokiim’bént) os 
Bro, rasa cumbens, lying oa 
ostrate ; trailing on the ground ; 
apps stems 
oro tin) ~ [L. fro, 
bates: ; eet ooth.} A layer of 
uncalcified smc capping tooth 
out before the formation of dentine 
ana. 
proembry: ne aie nie nm. (Gk. pro, 
for; ¢ tus.] An embry- 
onic stricture see ng the true 
em ; the first results of spore 
ryo 
segmentation (d02.). 
te (pro 'gimét’) nm. [Gk. pro, 
panre; pea union.] A structure 
giving rise to ete —— 
in perce Fun ngi 
a progam k) a. [Gk. oe 
befor gamos, union é, 
neat iP erion for gamete ee. 
tion (zool.). 
of a 
tapeworm, formed by strobileation 
from the neck (zool.); sing. p 
com 
ous (prégnath’iis) @ [Gk 
pro, ae feat ; gnathos, jaw.| Having 
prominent or oe jaw: 
prohydrot: (pro’hidrdt’ roptam) 
. [Gk. Ze for; _Aydor, water ; 
trope, a turning.] Positive hisradl 
tropism (4 
Projectile (projek’til) a. L. pro, 
forth ; eos to throw.] Protee 
a Pes can be thrust forward 
256 
PRO- 
gettin eens te he a, 
forth ; 
referee: Toe pete ct to shee 
rgans of sense b ans of the 
connecting projection nerve-fibres 
LYS.) 
proleg (prd’ ing rapes Ee be. for ; 
M. 
leg, An_ unjointed 
abdominal ad of arthropod 
larvae (zoo/.). 
proliferate (proli erat) v. sa proles, 
offspring ; /ferre, t To re- 
roduce repeate 
proliferation ‘argh ashen) te pln 
Y/ rin erre, to bear.] 
Prolification ; increase by frequent 
and Sag racer ei a of any 
kind (ézo. 
Shee ol ss) [L. profes, 
ing ; ferre, to bear.]_ Multiply- 
oe saiickis (Biol: : vasa Demet 
leaves ; dev umera 
parts capt ot.). 
romito coe et oaaked sis) 7. [Gk. pra, 
for ; mitos, thread.] A simple type 
of mitosis pat in nuclei of 
ee te de type (cyZ. 
tory (p rém’éntori) n [L. pro, 
per mountain.] A prom- 
egcemee. as of the 
ology (pro’ morforéjt) N 
k. bas for ; st Si form ; logos, 
discou hology from the 
pesos sadn int 
promuscis (prémiis’ is) nm. [L. pro- 
a proper | The proboscis 
of Hemiptera (zool. 
sieaeaboatinae “(pro" misé'l itim) #. [Gk. 
pro, for ; mykes, mushroom.] The 
mycelium developed from a zygo- 
= itself giving rise to a spor- 
angium 
pro: enna (pro’ nat) a. [L. pronare, to 
in nd forward.] Prone; incline 
pronation (préna’shiin) #. [L. pronare, 
to bend forward.] The act sd _— 
the palm of the hand is turned 
—— a a of ee mane 
Bite oe on (phys.). 
saeiieete pronefrik) a. ee ibs 
efore ; tas kidney.] Pert. or 
in the of the Tp psiaaiee ; 
appl. déch, ales (em. 
pronephros (pronéfrés) #. [Gk. ag 
before; wephros, kidney. 
