Lewis & Short

tūbercŭlum, i, n. dim. [1. tuber], a small swelling, bump, or protuberance; a boil, pimple, tubercle: in gingivis, Cels. 6, 13: in capite, id. 7, 6: fabae, an excrescence, Plin. 22, 22, 45, § 91; 11, 11, 12, § 29.