| feline acquired immunodeficiency syndrome | <syndrome> Acquired defect of cellular immunity that occurs in cats infected with feline immunodeficiency virus (fiv) and in some cats infected with feline leukaemia virus (felv). (12 Dec 1998) |
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| foot deformities, acquired | Distortion or disfigurement of the foot, or a part of the foot, acquired through disease or injury after birth. (12 Dec 1998) |