| ACF | accessory clinical findings; acute care facility; anterior cervical fusion; area correction factor; ... |
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| AChA | anterior choroidal artery |
| ACL | Achievement Check List; acromegaloid features, cutis verticis gyrata, corneal leukoma [syndrome]; an... |
| ACLR | anterior capsulolabral reconstruction |
| ACoA | anterior communicating artery |
| anterior embryotoxon | An opaque, grayish ring at the periphery of the cornea just within the sclerocorneal junction, of frequent occurrence in the aged; it results from a deposit of fatty granules in, or hyaline degeneration of, the lamellae and cells of the cornea. Synonym: anterior embryotoxon, arcus adiposus, arcus juvenilis, arcus lipoides, arcus senilis, gerontoxon, linea corneae senilis, lipoidosis corneae. (05 Mar 2000) |
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| anterior epithelium of cornea | The stratified squamous epithelium covering the outer surface of the cornea; it is smooth, consists usually of five layers of cells, and contains numerous free nerve endings. Synonym: epithelium anterius corneae. (05 Mar 2000) |
| anterior ethmoidal air cells | The anterior group of air cells of the ethmoidal sinus's; each sinus communicates with the middle meatus of the nasal cavity. Synonym: sinus ethmoidales anteriores, anterior cells, anterior sinuses, cellulae anteriores. (05 Mar 2000) |
| anterior ethmoidal artery | <anatomy, artery> Origin, ophthalmic; distribution, cerebral membranes in anterior cranial fossa, anterior ethmoidal cells, frontal sinus, anterior upper part of nasal mucous membrane, skin of dorsum of nose. Synonym: arteria ethmoidalis anterior. (05 Mar 2000) |
| anterior ethmoidal nerve | <anatomy, nerve> A branch of the nasociliary nerve; passes through anterior ethmoidal foramen on superomedial wall of orbit into cranial cavity, giving rise to anterior meningeal nerves, then passes through cribriform plates into nasal cavity, supplying anterosuperior nasal mucosa. Synonym: nervus ethmoidalis anterior. (05 Mar 2000) |
| anterior extremity | Specifically, the anterior end of the spleen (extremitas anterior splenis ). Synonym: extremitas anterior. (05 Mar 2000) |
| 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) |