| AMN | adrenomyeloneuropathy; alloxazine mononucleotide; aminonucleoside; anterior median nucleus |
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| aMVL | anterior mitral valve leaflet |
| AN | acanthosis nigricans; acne neonatorum; acoustic neuroma; adult, normal; ala nasi; amyl nitrate; aneu... |
| AND | algoneurodystrophy; anterior nasal discharge |
| ANS | acanthion; American Nutrition Society; 8-anilino-1-naphthalene-sulfonic acid; anterior nasal spine; ... |
| anterior extremity | Specifically, the anterior end of the spleen (extremitas anterior splenis ). Synonym: extremitas anterior. (05 Mar 2000) |
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| anterior extremity of caudate nucleus | The head or anterior extremity of the caudate nucleus projecting into the anterior horn of the lateral ventricle. Synonym: caput nuclei caudati, anterior extremity of caudate nucleus. (05 Mar 2000) |
| anterior eye segment | That part of the eyeball anterior to the lens. (12 Dec 1998) |
| anterior facial vein | <anatomy, vein> A continuation of the angular vein at the medial angle of the eye. It passes diagonally downward and outward, joining with the retromandibular vein below the border of the lower jaw before emptying into the internal jugular vein. Synonym: anterior facial vein, vena facialis anterior, vena facialis. (05 Mar 2000) |
| 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) |
| 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 gray column | The central gray matter of the spinal cord surrounding the central canal. Synonym: substantia intermedia centralis et lateralis, anterior gray column, Stilling's gelatinous substance, substantia gelatinosa centralis. (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) |