PROPTERYGIAL 



1190 



PROSLYSIS 



Propterygial (pro-ter-ij'-e-al) [~po, before; nrepvytov, 

 a little wing]. Pertaining to the propterygium. 



Propterygium ( pro-ter-ij' '-e-um) [irpo, before ; Trrepv- 

 yiov, a little wing, fin: pi. , Propterygia~\. In biol- 

 ogy, one of the three segments of the skeleton of the 

 anterior fin of a fish. Cf. Mesopterygium, Metaptery- 

 gium. 



Proptoma (prop-to' -mak) [~p6, before; ir-a/ia, a fall : 

 pi. , Proptomatd\. A prolapse, or the protruding mass 

 resulting from a prolapse. P. auricularum, flap ears. 

 P. mammarum, a pendulous condition of the breasts. 

 P. palpebrarum. Synonym of Ptosis. 



Proptosis (prop-to' -sis) [vpo, forward; Trrwovc, a fall- 

 ing]. A falling downward of an organ from its 

 place. Prolapse. P., Entero-. See Enteroproptosis. 

 P., Gastro-. See Gastroptosis. P. oculi. Syno- 

 nym of Exophthalmos. P. palpebrse, ptosis. P. 

 uvulae. Synonym of Staphyledema. 



Proptysis (prop'-tis-is). Synonym of Expectoration. 



Propulsion ( pro-pul' -shun) \_pro, before; pellere, to 

 push]. The act of pushing or being pushed forward. 

 It is a symptom of paralysis agitans ; as the patient 

 walks there is a progressive increase in the rapidity of 

 his gait, until he breaks into a run. This continues 

 until he either falls or seizes a support. See Paraly- 

 sis agitans and Festination. 



Propupa (pro-pu'-pah) [pro, before ; pupa, pupa]. In 

 biology, that stage of insect development immediately 

 preceding the pupa. 



Propygidium ( pro-pi- jid' -e-um) [irpo, before ; tvvjtj, 

 rump ; dim. wiov : pi, Propygidia~\. In biology, the 

 penultimate dorsal segment of the abdomen of certain 

 insects. 



Propyl (pro'-pil) [npuroq, first; v2,tj, matter], C 3 H r 

 The radicle of propane. 



'Ptopyla.vain. (pro-pil' -am-in) [-puror, first ; vkrj, matter; 

 amin\, C :j H 9 N. A ptomain, isomeric with trimethyl- 

 amin. There are two propylamins possible, represented 

 by the formulse CH 3 .CH 2 .CH 2 .NH 2 and (CH 3 ) 2 .- 

 CH 2 . The former, or normal compound, boils at 47 — 

 48 C. ; while the latter, or isopropylamin, boils at 

 31. 5° C. Iso-propylamin has been found among the 

 distillation-products of beet-root molasses. Normal 

 propylamin has been obtained from cultures of the 

 bacteria of human feces, and a strongly similar basic 

 substance from a cadaver. Both are non-poisonous 

 liquids possessing an ammoniacal, fish-like smell. See 



- Ptomains, Table of. 



Propylene (pro' -pil-en) [irpuroq, first ; niuv, fat ; Vhj, 

 matter], C 3 H 6 . A gaseous hydrocarbon belonging 

 to the series of the olefins. 



Prora (pro' -rah) [irpupa, the prow of a ship]. I. Occi- 

 put. 2. In biology, prow-shaped or C-shaped, as certain 

 sponge-spicules. Prorae, Sutura, the lambdoid suture. 



Proral (pro'-ral). See Cephalic. 



Prorenal (pro-re'-nal) [pro, for, before ; ren, the kid- 

 ney]. In biology, preceding the true kidney. See 

 Duct, Segmental. 



Pro re nata (pro-re-na'-tah) [L.]. A phrase signifying 

 according to the circumstances of the case. 



Prorrhesis (pror-e'-sis). Synonym of Prognosis. 



Prorsad (pror'-sad) [prorsum, forward]. Toward the 

 anterior aspect. 



Prorsal (pror'-sal) [prorsum, forward]. Anterior; 

 forward. 



Proruption (pror-up'-shun). Synonym of Eruption. 



Pros's Apparatus. A contrivance for making con- 

 tinuous traction on the obstetric forceps, the counter- 

 pressure being exerted upon the bed, that forms part 

 of the apparatus. 



Prosarma (pro-sar'-mah) [it pooaipetv, to take up]. In- 

 gesta; anything ingested. 



Prosartema (pros-ar'-tem-ah) [-pocdpTtjfia, appen- 

 dage]. In biology, the appendage connected with 

 the inner side of the first joint of the first pair of an- 

 tennae in macrurous crustaceans. (Bate.) 



Prosarthrosis (pros-ar-thro'-sis). Synonym of I 

 throsis. 



Proscapula (pro-skap' -tt- la h) [pro, before ; scapula, 

 shoulder-blade : pi., Proscapulce\. In biology, one of 

 the principal parameric elements of the shoulder-girdle 

 of a fish. The humerus of Cuvier, the coracoid of 

 Owen, and the clavicle of later writers. 



Proscapular (pro-skap' -u-lar) [pro, before; scapula, 

 shoulder-blade]. Pertaining to the proscapula. 



Proschysis (pros' -his- is) [prpoq, before ; x vol C a pour 

 ing]. Affusion. 



Proscolecine (pro-skol'-es-in) [irp6 , before ; anu'/jj^, a 

 worm]. Pertaining to a proscolex. 



Proscolex (pro - sko'- leks) [ irpo, before; cjk6?jj^, a 

 worm: pi., Proscolices~\. In biology, the embryo of a 

 cestode worm immediately after leaving the egg. It is 

 a microscopic spheric or oval body provided at one pole 

 with three pairs of divergent spicules by which it is 

 enabled to penetrate the walls of the stomach or intes- 

 tine of its host. 



Proscolla (pros-kol'-ak) [7rpdc, before ; KoXAa, glue : //., 

 Proscol!ce~\. See Retinaculum. 



Proscutal (pro - sku'- tal) [pro, before; scutum, a 

 shield]. Pertaining to the proscutum. 



Proscutellar (pro-sku-tel'-ar) [pro, before; scutellum, 

 a little shield]. Pertaining to the proscutellum. 



Proscutellum (pro-sku-tel' -um) [pro, before; 



lum, a little shield : pi. , Proscutella~\. In biology, the 

 penultimate piece of the pronotum of an arthropod. 



Proscutum (pro-sku'-tum) [pro, before ; scutum, r. 

 shield: //., Proscuta~\. The scutum, or second piece 

 of the pronotum of an arthropod. 



Prosection (pro-sek' -shun) [prosecare, to cut off from 

 before]. Dissection practised by a prosector. 



Prosector (pro-sek' -tor) [pro, for; sector, cutter]. An 

 officer of a medical college who prepares subjects for 

 anatomic dissection, or to illustrate didactic lecti 



Prosectorship (pro-sek' -tor-ship) [prosecare, to ci 

 from before]. The office of a prosector. 



Prosencephal (pros-en'-sef-al). Same as Prosen- 

 cephalon. 



Prosencephalic (pros - en - sef- al'- ik) [irp6r, before ; j 

 eyae^aXiig , brain]. Pertaining to the forehead or 

 forebrain ; frontal. P. Arch, the neural arch of a 

 frontal vertebra. 



Prosencephalon (pros -en- sef -al- on) [~p6c,, before; ; 

 eyne<pa?ix>c, , brain]. The forebrain ; that part of the 

 anterior cerebral vesicle from which are developed the 

 hemispheres, the callosum, the anterior commiss 

 the fornix, the septum lucidum, the anterior perf 

 space, the olfactory lobes, and the corpus striatum 

 The cavity is the prosocele. 



Prosenchyma (pros-eng'-kim-ah) [~p6q, near; 

 an infusion]. In biology, a term used to desi 

 the elongated, taper-pointed cells and vessi 

 plants. 



Prosenchymatous (pros-eng-kim' -at-us) [-><«•, near. 

 iyxvua, an infusion]. Belonging or pertaining to the 

 prosenchyma. 



Prosenthesis (pros - en'- thes- is) [irp6<;, to : 

 putting in, insertion]. In biology, a supplemi 

 relation which the measure of the phyllotaxis 

 in the transition from the last leaf of one cycle I 

 first of the next. (Sachs.) 



Prosethmoid (pros-etli'-moid) [-pne, toward; , 

 sieve]. In biology, the median ethmoid bone of the 

 skull of a fish. 



Proslysis (pros' -lis -is). Same as Catalysis. 



