| pars prelaminaris nervi optici | <anatomy, nerve> The portion of the optic nerve anterior to the lamina cribrosa of the sclera. Synonym: pars prelaminaris nervi optici. (05 Mar 2000) |
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| pars presulcalis | The back of the tongue; the upper surface of the tongue divided by the sulcus terminalis into an anterior two-thirds, the pars presulcalis (presulcal part), and a posterior one-third, the pars postsulcalis (postsulcal part). Synonym: dorsum linguae. (05 Mar 2000) |
| pars profunda glandulae parotideae | <anatomy> A salivary gland situated in front of and below the ear. (27 Sep 1997) |
| pars profunda musculi masseteri | pars profunda musculi masseteri |
| pars profunda musculi sphincteri ani externi | pars profunda musculi sphincteri ani externi |
| pars prostatica urethrae | The prostatic part of the male urethra, about 2.5 cm in length, that traverses the prostate; it includes the seminal colliculus, and the ejaculatory and prostatic ducts open into it. Synonym: pars prostatica urethrae. (05 Mar 2000) |
| pars pterygopharyngea musculi constrictoris pharyngis superioris | pars pterygopharyngea musculi constrictoris pharyngis superioris |
| pars pylorica gastris | pyloric part of stomach |
| pars pylorica ventriculi | <anatomy> An alternate term for pyloric part of stomach. (05 Mar 2000) |
| pars quadrata hepatis | The part of the medial segment of the liver which includes the quadrate lobe. Synonym: pars quadrata hepatis. (05 Mar 2000) |
| pars radiata lobuli corticalis renis | The centre of the renal lobule, which has the shape of a small, steep pyramid, consisting of straight tubular parts; these may be either ascending or descending limbs of the nephronic loop or collecting tubules. Synonym: pars radiata lobuli corticalis renis, Ferrein's pyramid, processus ferreini. (05 Mar 2000) |
| pars recta musculi cricothyroidei | cricothyroid muscle |
| pars retrolentiformis capsulae internae | That portion of the capsule caudal to the lentiform nucleus which contains large parts of the optic or geniculocalcarine radiation and other fibre systems. Synonym: pars retrolentiformis capsulae internae, retrolenticular limb of internal capsule. (05 Mar 2000) |
| pars sacralis medullae spinalis | The part of the cord from which consists of the five sacral segments of the spinal cord (S1-S5) and from which five pairs of sacral nerves originate. Synonym: pars sacralis medullae spinalis, segmenta medullae spinalis sacralia. (05 Mar 2000) |
| pars sellaris | <anatomy> A transverse depression crossing the midline on the superior surface of the body of the sphenoid bone and containing the pituitary gland. It is named "turkish saddle" from its resemblance to the saddle used by turks. (12 Dec 1998) |