| AHS | Academy of Health Sciences; African horse sickness; alveolar hypoventilation syndrome; American Hear... |
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| AHSDF | area health service development fund |
| AIM | Abridged Index Medicus; acute transverse myelopathy; area of interest magnification; artificial inte... |
| AL | angiographic area of lateral projection |
| ALAO | angiographic area of left anterior oblique projection |
primary's area
| 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) |
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| 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) |
| Broca's area | The posterior part of the inferior frontal gyrus of the left or dominant hemisphere, corresponding approximately to Brodmann's area 44; Broca identified this region as an essential component of the motor mechanisms governing articulated speech. Synonym: Broca's area, Broca's field, motor speech centre. (05 Mar 2000) |
| Broca's parolfactory area | 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) |
| vagus area | A portion of the floor of the fourth ventricle overlying the vagoglossopharyngeal nuclei. (05 Mar 2000) |
| macular area | 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) |
| gastric area | 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) |
| Panum's area | The area in and about the macula retinae in which stimulation of noncorresponding retinal points nevertheless results in stereoscopic vision. Synonym: fusion area. (05 Mar 2000) |
| management area | Management areas are specific geographical areas defined by a forest plan. Each management area has a set of objectives and a management prescription unique to it. (05 Dec 1998) |
| ventral tegmental area | A region in the mesencephalon which is dorsomedial to the substantia nigra and ventral to the red nucleus. The mesocortical and mesolimbic dopaminergic systems originate here, including an important projection to the nucleus accumbens. Overactivity of the cells in this area has been suspected to contribute to the positive symptoms of schizophrenia. (12 Dec 1998) |
| parastriate area | Area of the occipital lobe concerned with vision. (12 Dec 1998) |
| Martegiani's area | The funnel-shaped dilation on the optic disk that indicates the beginning of the hyaloid canal. Synonym: Martegiani's area. (05 Mar 2000) |
| germinal area | Area germinativa, the place in the blastoderm where the embryo begins to be formed. Synonym: germinal disk. (05 Mar 2000) |
| parolfactory area | 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) |