tri·se·mic \(ˈ)trī|sēmik\adjective ortri·seme\ˈtrīˌsēm\ Etymology:trisemic from Greek trisēmos of three time units (from tri- three + -sēmos, from sēmeion unit of time, mark, sign, from sēma sign) + English -ic; triseme from Greek trisēmos — more at tri-, semantics : consisting of or equal in duration to three morae < a trisemic syllable >