collybus (collŭbus), i, m., = κόλλυβος [prob. of Phoenicio-Semitic origin, kindr. with the Heb., to change], the exchange of coins of different kinds, or of different countries, agio.
I Prop., Cic. Att. 12, 6, 1; Cassiod. Parm. ap. Suet. Aug. 4.—
II Meton., the rate or premium of exchange , Cic. Verr. 2, 3, 78, § 181.
collybus ī, m , κόλλυβος, exchange, agio.— The rate of exchange. ...
An Elementary Latin Dictionary