Lewis Short
cĕrătĭum (noun N) = κεράτιον: (St. John's bread)
* A Greek weight corresponding to the Latin siliqua = 2. calculi, Auct. Ponder. in Goes. Agrar. p. 322 (in Col. 5, 10, 20, and Arb. 25, 1, written as Greek).
Charlton T. Lewis, Charles Short, A Latin Dictionary