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A Abadies sign 1 . A sign in tabes dorsalis in which there is loss of pain from squeezing the calcaneal tendon 2. Spasm of the levator palpebrae superioris muscles occurring frequently in thyro- toxicosis but also seen normally especially with tension and fatigue. Abalienation Mental deterioration or derangement. Abampere An electromagnetic unit of current equivalent to 10 amperes. Abapical Away from or opposite the apex. Abaptiston A conical trephine so designed that it will not slip through the bony opening and injure the underlying dura mater or brain. Abarognosis Loss or lack of the ability to estimate weight, brag- nosis. Abarticular Not connected with or situated near a joint. Abarticulation 1. A diarthrodial joint 2. A dislocation of a joint. Abasia Inability to walk because of motor incoordination; compare astasia. Abate To lessen in force or intensity; to moderate or subside. Abattage, abatage 1. The slaughter of animals, specifically, the slaugh- ter of diseased animals to prevent infection of others 2. The art of casting an animal preparatory to an operation. Abattoir A slaughter house or an es- tablishment for the killing and dressing of animals. Abaxial Not situated in the line of the axis of a structure. Abderhalden reaction or test The detection of an abnormal proteo- lytic enzyme active against a foreign protein elaborated in the course of pregnancy, cancer, schizophrenia and various infec- tions. Abdomen abstipum An abdominal deformity resulting from congeni- tally short recti muscles. Abdominal angina An acute attack of severe abdominal pain, comm- only occurring after eating and often associated with weight loss, nausea, vomiting and diarrhoea. It is caused by narrowing or obstruc- tion of the mesenteric arteries, primarily atherosclerotic in origin. Abdominal aponeurosis The wide tendinous expanse by which the ex- ternal oblique, internal oblique and transverse muscles are inserted. Abdominal apoplexy Infarction of an abdominal organ, usually the small intestine, resulting from vas- cular stenosis or occlusion. Abdominal dropsy Ascites. Abdominal epilepsy A convulsive equivalent in which abdominal pain, a sense of nausea and often headache are the most prominent symptoms. Abdominal influenza Viral gastro- enteritis.
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