perosis

noun
pe·​ro·​sis | \ pə-ˈrō-səs How to pronounce perosis (audio) \
plural peroses\ -​ˌsēz How to pronounce peroses (audio) \

Medical Definition of perosis

: a disorder of poultry that is characterized by leg deformity and is caused by a deficiency of vitamins (as biotin or choline) or minerals (as manganese) in the diet

called also hock disease, slipped tendon

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