| ACC | accommodation; acetyl coenzyme A carboxylase; acinic cell carcinoma; acute care center; adenoid cyst... |
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| ACD | absolute cardiac dullness; absolute claudication distance; acid-citrate-dextrose [solution]; actinom... |
| AChA | anterior choroidal artery |
| ACL | Achievement Check List; acromegaloid features, cutis verticis gyrata, corneal leukoma [syndrome]; an... |
| ACLR | anterior capsulolabral reconstruction |
| discus articularis acromioclavicularis | The articular disk of fibrocartilage usually found between the acromial end of the clavicle and the medial border of the acromion. Synonym: discus articularis acromioclavicularis, acromioclavicular disk, Weitbrecht's cartilage. (05 Mar 2000) |
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| discus articularis radioulnaris | The disk that holds together the distal ends of the radius and ulna; it is attached by its apex to a depression between the styloid process and distal surface of the head of the ulna, and by its base to the ridge separating the ulnar notch from the carpal surface of the radius. Synonym: discus articularis radioulnaris, radioulnar disk, radioulnar articular disk, triangular cartilage, triangular disk of wrist, triquetrous cartilage. (05 Mar 2000) |
| discus articularis sternoclavicularis | The fibrocartilaginous disk that subdivides the sternoclavicular joint into two cavities. Synonym: discus articularis sternoclavicularis, sternoclavicular disk, sternoclavicular articular disk. (05 Mar 2000) |
| discus articularis temporomandibularis | The fibrocartilaginous plate that separates the joint into upper and lower cavities. Synonym: discus articularis temporomandibularis, mandibular disk, temporomandibular articular disk. (05 Mar 2000) |
| eminentia articularis ossis temporalis | Articular eminence of the temporal bone which bounds the mandibular fossa anteriorly; it forms the anterior root of the zygomatic process; it is enclosed by the articular capsule of the temporomandibular joint with the articular fossa; the head of the mandible (and intervening articular disc) move onto the articular tubercle to allow full depression of mandible (opening of mouth). Synonym: tuberculum articulare ossis temporalis, articular eminence of temporal bone, eminentia articularis ossis temporalis, tuber zygomaticum. (05 Mar 2000) |
| fovea articularis capitis radii | The depression on the top (superior surface) of the head of the radius for articulation with the capitulum of the humerus. Synonym: fovea articularis capitis radii, articular pit of head of radius. (05 Mar 2000) |
| fovea articularis inferior atlantis | One of two concave surfaces on the lateral masses of the atlas that articulate with corresponding surfaces on the axis. Synonym: facies articularis inferior atlantis, fovea articularis inferior atlantis, inferior articular pit of atlas. (05 Mar 2000) |
| fovea articularis superior atlantis | One of two concave articular surfaces on the superior aspect of the lateral masses of the atlas that articulate with the occipital condyles. Synonym: facies articularis superior atlantis, fovea articularis superior atlantis, superior articular pit of atlas. (05 Mar 2000) |
| acromial articular facies of clavicle | Synonym: acromial articular surface of clavicle. (05 Mar 2000) |
| adenoid facies | The open-mouthed and often dull appearance in children with adenoid hypertrophy, associated with a pinched nose. (05 Mar 2000) |
| aortic facies | The pale sallow complexion of one suffering from incompetence of the aortic valve. (05 Mar 2000) |
| Parkinson's facies | The expressionless or masklike facies characteristic of parkinsonism. Synonym: masklike face. (05 Mar 2000) |
| cherubic facies | The characteristic child-like facies seen in cherubism; also seen in glycogenosis, particularly type 2. (05 Mar 2000) |
| mitral facies | The pink, slightly cyanosed cheeks of patients with mitral valve disease. (05 Mar 2000) |
| moon facies | Roundness of the face due to increased fat deposition laterally seen in patients with hyperadrenocorticalism, either of endogenous (e.g., Cushing's disease) or exogenous origin, such as the use of cortisone-like drugs as therapy. (05 Mar 2000) |