M / mentā^gra
noun

mentā^gra

gen. mentā^grae · gender feminine · decl. 1st
mentum - ἄγρα, formed after pod-agra; lit., chin-disease
an eruption, tetter on the chin
an eruption, tetter on the chin (i. q. lichen, q. v.), Plin. 26, 1, 2, § 2.