tōfus (tōphus), i, m.,
tufa or tuff; Ital. tufo , Plin. 17, 4, 3, § 29; 36, 22, 48, § 166; Vitr. 2, 7; Front. Aquaed. 122; Verg. G. 2, 214; Ov. M. 3, 160; 8, 562; Stat. S. 4, 3, 52.
tōfus (-phus) ī, m tufa, tuff, porous stone: scaber, V., O. ...
An Elementary Latin Dictionary
·noun Tufa. ·see under Tufa, and Toph. II. Tofus ·noun <<Tophus>>. ...
Webster's Dictionary of the English Language