Cassĭtĕrĭdes, um, f., = Κασσιτερίδες,
the tin-islands , Cassiterides , now prob. the Scilly Islands , Mel. 3, 6, 2; Plin. 4, 22, 36, § 119; named from the tin found there; v. cassiterum.
CASSITE´RIDES in Britain. The tin-county of Cornwall, with which the Scilly Isles were more or less ...
Dictionary of Greek and Roman Geography