| AIM | Abridged Index Medicus; acute transverse myelopathy; area of interest magnification; artificial inte... |
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| AL | angiographic area of lateral projection |
| ALAO | angiographic area of left anterior oblique projection |
| AMA | against medical advice; alkaline membrane assay; American Management Association; American Medical A... |
| Ao | orifice area |
| area acustica | The floor of the lateral recess of the fourth ventricle, extending medially to the limiting sulcus and overlying the cochlear and vestibular nuclei of the rhombencephalon. Synonym: area acustica. (05 Mar 2000) |
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| area centralis | An oval area of the sensory retina, 3 by 5 mm, temporal to the optic disk corresponding to the posterior pole of the eye; at its centre is the central fovea, which contains only retinal cones. Synonym: area centralis, macula lutea, macular area, punctum luteum, Soemmerring's spot, yellow spot. (05 Mar 2000) |
| area cochleae | The area inferior to the transverse crest of the fundus of the internal acoustic meatus through which the filaments of the cochlear nerve pass to enter the cochlea; forms the base of the cone-shaped modiolus about which the cochlear canal spirals. See: base of modiolus. Synonym: area cochleae. (05 Mar 2000) |
| area cribrosa papillae renalis | The apex of a renal papilla pierced by 10 to 22 openings of the papillary ducts, the foramina papillaria. Synonym: area cribrosa papillae renalis. (05 Mar 2000) |
| area gastrica | One of a number of small polygonal area's, 1-6 mm in diameter, separated by linear depressions on the surface of the mucous membrane of the stomach; they contain the gastric pits, with several gastric glands opening into each pit. Synonym: area gastrica. (05 Mar 2000) |
| area health education centres | Education centres authorised by the comprehensive health manpower training act, 1971, for the training of health personnel in areas where health needs are the greatest. May be used for centres other than those established by the united states act. (12 Dec 1998) |
| area intercondylaris anterior tibiae | The broad depressed area between the tibial condyles anteriorly to which attach the anterior ends of the menisci and the anterior cruciate ligament. Synonym: area intercondylaris anterior tibiae. (05 Mar 2000) |
| area intercondylaris posterior tibiae | The deep notch between the tibial condyles posteriorly to which attaches the posterior cruciate ligament. Synonym: area intercondylaris posterior tibiae. (05 Mar 2000) |
| area nervi facialis | <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) |
| area nuda hepatis | 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) |
| area of cardiac dullness | A triangular area determined by percussion of the front of the chest; it corresponds to the part of the heart that is not covered by lung tissue. (05 Mar 2000) |
| 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) |
| 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) |