Definify.com
Webster 1913 Edition
Ringworm
Ring′worm′
,Noun.
(Med.)
A contagious affection of the skin due to the presence of a vegetable parasite, and forming ring-shaped discolored patches covered with vesicles or powdery scales. It occurs either on the body, the face, or the scalp. Different varieties are distinguished as
Tinea circinata
, Tinea tonsurans
, etc., but all are caused by the same parasite (a species of Trichophyton
).