=Per´i-stal´´sis.= A worm-like movement by which the alimentary canal propels its contents. =Per-ni´cious.= Tending to a fatal issue. =Phe-nom´e-non.= Any remarkable appearance; any sign or objective symptom. =Phys´i-o-log´´ic.= Pertaining to physiology. =Phys´i-ol´´o-gy.= The science which treats of the functions of the living organism and its parts. =Phi-mo´sis.= Tightness of the foreskin such that it can not be drawn back over the glans. =Phle-bi´tis.= Inflammation of a vein. =Pig´men-ta´´tion.= The deposition of coloring matter. =Pla-cen´ta præ´vi-a.= A placenta which intervenes between the intrauterine cavity and the inner orifice of the cervical canal. =Pla-cen´ta suc´cen-tur´i-a´´ta.= An accessory or subsidiary placenta. =Pled´get.= A small compress or tuft as of wool or lint. =Pleth´o-ra.= A condition marked by vascular turgescence, excess of blood and fullness of pulse. =Po-dal´ic.= Pertaining to, or accomplished by means of, the feet. =Pol´y-hy-dram´´ni-os.= Excess in the amount of the liquor amnii in pregnancy. =Po-si´tion.= 1. The attitude or posture of a patient. 2. The relation of the presenting part of the fœtus to the quadrants of the maternal pelvis. =Pos-te´ri-or.= Situated behind or toward the rear. =Post par´tum.= After delivery. =Pre´ma-ture.= 1. Occurring before the proper time. 2. An infant born before its proper term, but viable. =Pre´ma-tu´´ri-ty.= The condition of a child that has been delivered before term, and before maturity or ripening has taken place. =Pre-mon´i-tory.= Serving as a warning. =Pre´puce.= The fold of skin covering the glans penis; the foreskin. =Pres´en-ta´´tion.= 1. The appearance in labor of some particular part of the fœtal body at the os uteri. 2. That part of the fœtal body which first shows itself at the os in labor. =Pri-mip´a-ra.= A woman who has given birth, or who is giving birth, to her first child. =Prod´ro-mal.= Premonitory. Indicating the approach of an event, phenomenon, or disease. =Prog-no´sis.= A forecast as to the probable result of an attack of disease; the prospect as to recovery from a disease afforded by the nature and symptoms of the case. =Pro-jec´tion-al vom´i-ting.= Sudden violent emesis. =Pro-lapse´.= The falling down, or sinking, of a part or viscus. =Pro-lep´sis.= The anticipation and nullification of complications before they arise. =Prom´´on-to´ry.= A projecting eminence or process. =Pro´phy-lax´´is.= The prevention of disease.