• (n.) Sycosis.
Men'ta·gra noun [ New Latin , from Latin mentum chin + Greek ... a catching.] (Medicine) Sycosis. 
mentagra 1. An eruption about the chin, caused by inflammation of the hair follicles of the beard; sycosis. 2. Sycosis (a pustular folliculitis [an inflammatory reaction in hair follicles; the lesions may have pus around the hairs], particularly of the bearded area).