| ACD | absolute cardiac dullness; absolute claudication distance; acid-citrate-dextrose [solution]; actinom... |
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| ACF | accessory clinical findings; acute care facility; anterior cervical fusion; area correction factor; ... |
| AChA | anterior choroidal artery |
| ACL | Achievement Check List; acromegaloid features, cutis verticis gyrata, corneal leukoma [syndrome]; an... |
| ACLR | anterior capsulolabral reconstruction |
| anterior femoral cutaneous nerves | Anterior cutaneous branches of femoral nerve; supplies distal 3/4 of skin and superficial fascia of anterior and medial thigh. Synonym: rami cutanei anteriores nervi femoralis. (05 Mar 2000) |
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| anterior focal point | The point where parallel rays from the retina are focused. (05 Mar 2000) |
| anterior fontanel | A diamond-shaped membranous interval at the junction of the coronal, sagittal, and metopic sutures where the frontal angles of the parietal bones meet the two ununited halves of the frontal bone. Synonym: fonticulus anterior, bregmatic fontanel, frontal fontanel. (05 Mar 2000) |
| anterior fovea | A slight depression in the limiting sulcus on either side of the rhomboidal fossa, above the medullary striae and lateral to the facial colliculus. Synonym: fovea superior, anterior fovea, fovea anterior. (05 Mar 2000) |
| anterior funiculus | Anterior white column of spinal cord, a column or bundle of white matter on either side of the anterior median fissure, between that and the anterolateral sulcus. Synonym: funiculus anterior. (05 Mar 2000) |
| anterior ground bundle | The ground bundle of the anterior column of the spinal cord. See: fasciculi proprii. Synonym: anterior ground bundle. Origin: L. Dim. Of fascis, bundle (05 Mar 2000) |
| anterior group of axillary lymph nodes | Lymph nodes located along the lateral thoracic vein; they receive the drainage of the pectoral region, including most of the drainage of the breast. Synonym: nodi lymphatici axillaris pectorales, anterior group of axillary lymph nodes. (05 Mar 2000) |
| anterior guide | In dentistry, that part of an articulator on which the anterior guide pin rests to maintain the vertical dimension of occlusion and the incisal guide angle as established by the incisal guidance; may be adjustable, with a superior surface that may be changed to provide variations in the incisal guide angle, or customised, being individually formed in plastic to allow other than straight line incisal guidance in eccentric movements. Synonym: anterior guide. (05 Mar 2000) |
| anterior horn | The anterior or frontal division of the lateral ventricle of the brain, extending forward from Monro's interventricular foramen. See: lateral ventricle. (05 Mar 2000) |
| anterior horn cell | Synonym for motoneuron. (18 Nov 1997) |
| anterior horn cells | Motor neurons in the anterior (ventral) horn of the spinal cord which project to skeletal muscles. (12 Dec 1998) |
| anterior humeral circumflex artery | <anatomy, artery> Origin, axillary; distribution, shoulder joint and biceps muscle; anastomoses, posterior circumflex humeral artery. Synonym: arteria circumflexa humeri anterior, anterior humeral circumflex artery. (05 Mar 2000) |
| anterior hypothalamic region | The rostral portion of the hypothalamus that includes preoptic, supraoptic, paraventricular and anterior hypothalamic nuclei; the hypothalamic structures located internally in the general area of the optic chiasm. (05 Mar 2000) |
| anterior inferior cerebellar artery | <anatomy, artery> Origin, basilar; distribution, lower surface of lateral lobes of cerebellum, choroid plexus in cerebellopontine angle; anastomoses, posterior inferior cerebellar; usual source of labyrinthine artery. Synonym: arteria cerebelli inferior anterior. (05 Mar 2000) |
| anterior inferior iliac spine | Spine on the anterior border of the ilium between the anterior superior iliac spine and the acetabulum; site of origin for the direct head of the rectus femoris muscle. Synonym: spina iliaca anterior inferior. (05 Mar 2000) |