τρίκροτος

ον
A. rowed with triple stroke, of a trireme, Aristid. Or. 25(43).4; sc. ναῦς, Sch.Ael. Tact. p.234K.-R.: cf. δίκροτος, μονόκροτος.
Liddell, Scott & Jones
A Greek-English Lexicon, 1940
An open-access project