The term trachy (Greek: τραχύ), plural trachea (τραχέα), meaning "rough" or "uneven", was used to describe the cup-shaped (incorrectly often called "scyphate") Byzantine coins struck in the 11th–14th centuries.^[1] The term was properly applied to coins of electrum, billon, or copper, and not to the gold hyperpyra.^[1]

During the short lifespan of the feudal Crusader state, the Latin Empire of Constantinople (1204–1261) also used the trachy.^[2]

• Kazhdan, Alexander, ed. (1991). The Oxford Dictionary of Byzantium. Oxford and New York: Oxford University Press. ISBN 978-0-19-504652-6.