| PPC | pentose phosphate cycle; peripheral posterior curve; plasma prothrombin conversion; pneumopericardiu... |
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| PRC | packed red cells; peer review committee; phase response curve; plasma renin concentration; professio... |
| P-V | pressure-volume [curve] |
| TAC | tachykinin; terminal antrum contraction; tetracaine, adrenalin, and cocaine; time-activity curve; to... |
| VFC | ventricular function curve |
| area of facial nerve | <anatomy, nerve> The area in the fundus of the internal acoustic meatus superior to the transverse crest through which the facial nerve passes to enter the facial canal. Synonym: area nervi facialis. (05 Mar 2000) |
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| area opaca | The peripheral area of the blastoderm of birds and reptiles which is opaque because of adherent yolk. (05 Mar 2000) |
| area parolfactoria | A small region of cerebral cortex on the medial surface of the frontal lobe, formed by the junction of the straight gyrus with the cingulate gyrus, demarcated from the subcallosal gyrus by the posterior parolfactory sulcus. Synonym: area parolfactoria, Broca's parolfactory area. (05 Mar 2000) |
| area pellucida | The translucent central part of the blastoderm of birds and reptiles. (05 Mar 2000) |
| area postrema | A small, elevated area in the lateral wall of the inferior recess of the fourth ventricle; one of the few loci in the brain where the blood-brain barrier is lacking; a chemoreceptor area associated with vomiting. (05 Mar 2000) |
| area subcallosa | A slender vertical whitish band immediately anterior to the lamina terminalis and anterior commissure; contrary to its name, it is not a cortical convolution but is the ventral continuation of the transparent septum. Synonym: area subcallosa, gyrus paraterminalis, gyrus subcallosus, pedunculus corporis callosi, corpus paraterminale, paraterminal body, paraterminal gyrus, peduncle of corpus callosum, precommissural septal area, subcallosal area, Zuckerkandl's convolution. (05 Mar 2000) |
| area vasculosa | The part of the area opaca of the embryonic blastoderm of the chick, where the first blood vessels appear. (05 Mar 2000) |
| area vestibularis inferior | The area of the fundus of the internal acoustic meatus inferior to the transverse crest through which the interior portion of the vestibular (saccular) nerve passes. Synonym: area vestibularis inferior. (05 Mar 2000) |
| area vestibularis superior | The area in the fundus of the internal acoustic meatus superior to the transverse crest through which the superior part of the vestibular nerve passes to reach the macula utriculus and the ampullae of the anterior and lateral saemicircular ducts. Synonym: area vestibularis superior. (05 Mar 2000) |
| attainment area | A geographic region where the concentration of a specific air pollutant does not exceed federal standards. (05 Dec 1998) |
| auditory area | Area of the temporal lobe concerned with hearing. (12 Dec 1998) |
| bare area of liver | The area on the posterior surface of the liver which is fused with the diaphragm and therefore not covered by peritoneum. Synonym: area nuda hepatis. (05 Mar 2000) |
| bare area of stomach | The part of posterior surface of the fundus of the stomach between the two diverging layers of the gastrophrenic ligament, that is not covered by peritoneum. (05 Mar 2000) |
| basal area | <botany> The cross-sectional area of a tree trunk measured in square inches, square centimetres, etc., basal area is normally measured at 4.5 feet above ground level and is used as a measure of dominance, the most commonly used tool for measuring basal area is a diameter tape or a D-tape (then convert to basal area). (09 Oct 1997) |
| basal seat area | That portion of the oral structures which is available to support a denture. (05 Mar 2000) |