Lewis & Short

* grāvastellus, i, m. dim. [‡ gravaster, from ‡ gravus, kindr. to γραῦς and the Ger. grau; Engl. gray; the ground-form of ravus], a gray-headed fellow: quis est haec muliercula et illic gravastellus qui venit? Plaut. Ep. 5, 1, 14; cf.: gravastellus senior, Paul. ex Fest. p. 96 Müll. (where it is erroneously derived from gravis; moreover, he reads s. v. Ravi coloris, p. 272, in Plautus, ravistellus).