Lewis Short
= βασανιτης β̔άσανος: băsănītes lăpis = )
* A touchstone, test-stone, a very hard stone, used as a test for the precious metals, for whetstones, and, in medicine, for mortars, Plin. 36, 20, 38, § 147; 36, 22, 43, § 157; Isid. Orig. 16, 4, 36.—Also basanites alone, Plin. 36, 7, 11, § 58.
Charlton T. Lewis, Charles Short, A Latin Dictionary