478 PREFIXES. 



pleuro-, pldr^d (Gr. pleura, the side), denoting connection with the 

 pleura, a side, or a rib ; as pleuro&ynia,, rheumatic or spasmodic pain 

 in the side. 



phiri-, pldr'-i (L. plures, many), many ; several ; as pZwnpartite, 

 separated into many distinct divisions. 



pneumato-, num'at>o, pnettmo-, num'o, and pneumon-, num'-on (Gr. 

 pneuma, air), connected with air or breath ; as pneumato-cyst, an air 

 sac or float of certain Hydrozoa. 



podo-, pdd'o (Gr. pous, a foot, podos, of a foot), a foot or stalk ; in L. 

 pes, a foot, peVZzs, of a foot ; as podoc&rp, a stalk supporting the fruit. 



poly-, pol f -i (Gr. polus, many), many; in L. multu-s; as po/yspennal, 

 containing many seeds. 



post (L. ), behind ; after ; afterwards : postfix, that which is put after ; 

 postscript, that which is written afterwards. 



prae or pre (L. prce), before ; priority of time, place, or rank : precede, 

 to go before ; predict, to say or tell before. 



preter-, pretfer (L. prceter), beyond ; more than : preternatural, beyond 

 the course of nature ; prefer-imperfect, more than imperfect. 



pro, with its forms por and pur (L. pro, for ; Gr. pro, before), for ; 

 forward; forth: proceed, to go for ward; provoke, to call forth : por- 

 tend, to indicate events forward : pursue, to follow forward. 



proto-, prot'-o (Gr. protds, first), first ; lowest ; in chem., a first degree 

 of combination, as of oxygen with metals ; as protoplast, the thing 

 first formed. 



pseud-, sud, and pseudo-, sud'd (Gr. pseudes, false), false or spurious ; 

 as psewcfo-membrane, a false membrane. 



pyr-, per, and pyro-, plr'-o (Gr. pur, fire, puros, of fire), denoting re- 

 lation to, or connection with, fire or heat ; as p^/rogenous, produced 

 or formed by fire. 



radio-, radf-l-o (L. radius, a spoke, a ray), denoting connection with 

 the smaller bone of the forearm ; as rac^o-carpal, applied to the joint 

 at the wrist which unites the ' radius ' with the ' carpus. ' 



re (L. ), back or again ; anew or a second time : reaffirm, to firm again ; 

 recommence, to begin anew. 



retro (L. ), back ; backward : retrospect, a looking back. 



rhino-, rln'-o (Gr. rhln, the nose, rhino's, of the nose), denoting connec- 

 tion with the nose ; as rhino&yma,, pain of the nose. 



sarco-, sdr-6 (Gr. sarx, flesh), denoting 'flesh or fleshy' ; as sarcocarp, 

 the fleshy part of certain fruits. 



sclero-, skUr f -o (Gr. skleros, hard), denoting hardness ; as sc?eroderma, a 

 disease in which the skin hardens and indurates. 



se (L.), aside ; a separating from : secede, to go aside, to separate from; 

 seduce, to lead aside. 



semi-, (L.), half ; in part : semicircle, half a circle ; in Gr. hemi, half. 



septem-, sept r -em (L. septem, seven), seven ; in Gr. hepta, seven ; as 

 sepferanervine, having seven nerves. 



sesqui-, s^ifcwi(L. sesqui, more by a half), in chem., denoting that 1J 

 equivalents of one constituent is united to one equivalent of another, 

 or in the proportion of * three to two ' ; a whole and a half; as sesgui- 

 carbonate, a salt composed of 1 J equivalents of carbonic acid and 1 

 equivalent of any base. 



sex-, s$ks (L. sex, six), six ; in Gr. hexa, six ; as sexdigitism, the con- 

 dition of having six fingers on a hand, and six toes on a foot. 



