por'tion

A part, a subdivision, or section. cavernous p. of the urethra. The posterior, dilated part of the spongy p. of the male urethra, the urethral bulb. descending p. of the duodenum. The p. of the duodenum which most nearly ■approaches the vertical, which is farthest to the right, and into which the duct us communis choledochus opens, facial p. of the skull. The p. of the skull underlying the face, frontal p. of the frontal bone. See pars frontal is o is front is, under pars, iliac p. of the fascia lat a. The p. of fascia lat a external to the saphenous opening, infra vaginal p., intra vaginal p. See vaginal p. of the neck of the uterus, mastoid, p. of the temporal hone. See mastoid proce , under proce , membranous p. of the urethra. That part between the apex of the prostate gland and the bulb of the corpus spongiosum, petrous p. of the temporal bone. The three sided, somewhat pyramidal proce of the temporal bone which projects forward and inward from between the squamous p. and the mastoid proce , with its base turned outward, and which contains the internal ear. prostatic p. of the urethra. The urethra as it pierces the prostate gland., spongy p. of the urethra. That part between the posterior limit of the bulb of the urethra and its external orifice in the glans penis, squamous p. of the temporal bone. The expanded curved anterior and superior p. of the temporal bone. Its upper border is beveled to overlap the parietal bone, with which it articulates, supra vaginal p. of the neck of the uterus. That p. of the neck of the uterus which lies above the vaginal insertion, tabular p. of the occipital bone. The p. of the occipital bone posterior to the foramen magnum, tabular p. of the temporal bone. See squamous p. of the temporal bone, vaginal p. of the neck of the uterus. That part which projects into the vagina. [Lat., portio, from Gr., pore in, to share.]