| ACL | Achievement Check List; acromegaloid features, cutis verticis gyrata, corneal leukoma [syndrome]; an... |
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| ACLR | anterior capsulolabral reconstruction |
| ACoA | anterior communicating artery |
| ACOM | American College of Occupational Medicine; anterior communicating [artery] |
| AComA | anterior communicating artery |
| anterior border of radius | The ridge on the shaft of the radius extending from the radial tuberosity to the anterior part of the styloid process. Synonym: margo anterior radii. (05 Mar 2000) |
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| anterior border of testis | An imaginary convex line demarcating the lateral and medial surfaces. Synonym: margo anterior testis. (05 Mar 2000) |
| anterior border of tibia | The sharp subcutaneous ridge of the tibia that extends from the tuberosity to the anterior part of the medial malleolus. Synonym: margo anterior tibiae, anticnemion, shin, tibial crest. (05 Mar 2000) |
| anterior border of ulna | The ridge on the body of the ulna that extends from the tuberosity to the anterior part of the styloid process. Synonym: margo anterior ulnae. (05 Mar 2000) |
| anterior brachial region | The anterior region of the arm. (05 Mar 2000) |
| anterior branch | The anterior branch of the following: great auricular nerve lateral cerebral sulcus left and right superior pulmonary veins medial cutaneous nerve of the forearm obturator artery obturator nerve renal artery right branch of portal vein right hepatic duct superior thyroid artery ulnar recurrent artery. Synonym: ramus anterior. (05 May 2002) |
| anterior caecal artery | <anatomy, artery> An artery that originates from the ileocolic artery and supplies the anterior region of caecum. Synonym: arteria caecalis anterior. (05 May 2002) |
| anterior canaliculus of chorda tympani | <anatomy> A canal in the petrotympanic or glaserian fissure, near its posterior edge, through which the chorda tympani nerve issues from the skull. Synonym: Civinini's canal, Huguier's canal, iter chordae anterius. (05 Mar 2000) |
| anterior cardiac veins | Two or three small veins in the anterior wall of the right ventricle opening directly into the right atrium independently of the coronary sinus. Synonym: venae cordis anteriores. (05 Mar 2000) |
| anterior cardinal veins | See: cardinal veins. (05 Mar 2000) |
| anterior carpal region | The anterior part of the wrist. Synonym: regio carpalis anterior. (05 Mar 2000) |
| anterior 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 central convolution | Bounded posteriorly by the central sulcus and anteriorly by the precentral sulcus. Synonym: gyrus precentralis, anterior central convolution, anterior central gyrus, ascending frontal convolution, ascending frontal gyrus. (05 Mar 2000) |
| anterior central gyrus | Bounded posteriorly by the central sulcus and anteriorly by the precentral sulcus. Synonym: gyrus precentralis, anterior central convolution, anterior central gyrus, ascending frontal convolution, ascending frontal gyrus. (05 Mar 2000) |
| anterior centriole | The centriole that lies in a depression in the wall of the posterior portion of the nucleus of the developing spermatozoon. Synonym: anterior centriole. (05 Mar 2000) |