| TAB vaccine | A suspension of killed typhoid and paratyphoid A and B bacilli. See: typhoid vaccine. Synonym: TAB vaccine. (05 Mar 2000) |
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| acro- | Combining form meaning: 1. Extremity, tip, end, peak, topmost. 2. Extreme. Origin: G. Akron, highest point, extremity; akros, topmost, outermost, inmost, extreme, tip (05 Mar 2000) |
| acro-osteolysis | <radiology> Loss of terminal tufts of digits, scleroderma / connective-tissue disease, psoriatic arthritis, Reiter disease, frostbite (thumbs spared), leprosy, polyvinylchloride exposure, hyperparathyroidism, Lesch-Nyhan syndrome (they bite them off), cleidocranial dysostosis, progeria, pyknodysostosis (aplasia/hypoplasia of distal digits), (?) sarcoidosis (12 Dec 1998) |
| osteopetrosis acro-osteolytica | <radiology> Autosomal recessive, dense, sclerotic bones [Cf: osteopetrosis (sporadic, not inherited)] Features: open cranial sutures and fontanelles, Wormian bones, dolichocephaly, sclerotic vertebrae, fractured long bones, short, stubby hands, partial agenesis/aplasia of terminal phalanges [simulates acro-osteolysis] (12 Dec 1998) |