tinea cru·ris -'kru̇r-əs n a fungal infection involving esp. the groin and perineum
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tinea in the groin or perineal area, sometimes spreading to nearby regions, seen most often in males who have tinea pedis and have the same etiologic agent for both infections. Characteristics include circumscribed pruritic lesions with raised erythematous margins and thin, dry scaling. Popularly called jock itch. Called also eczema marginatum, ringworm of the groin, and t. inguinalis.Medical dictionary. 2011.