| TAD | test of auditory discrimination; thoracic asphyxiant dystrophy; transient acantholytic dermatosis |
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| UD | ulcerative dermatosis; ulnar deviation; undetermined; underdeveloped; unit dose; urethral dilatation... |
| filarial dermatosis | A disease of sheep on high mountain ranges during the summer caused by larvae of the filarial worm, Elaeophora schneideri, which localise chiefly on the head, causing intense itching and loss of wool. Synonym: sorehead. (05 Mar 2000) |
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| lichenoid dermatosis | Any chronic skin eruption, characterised clinically by induration and thickening of the skin with accentuation of skin markings, and microscopically by a band-like lymphocytic infiltration of the papillary dermis. (05 Mar 2000) |