Trī'graph, n.
n. [Gr. τρι, τρίς, three, thrice, and γραφή, a writing, γράφειν, to write.] Three letters united in pronunciation so as to have but one sound, or to form but one syllable, as ieu in adieu; a triphthong.
n. [Gr. τρι, τρίς, three, thrice, and γραφή, a writing, γράφειν, to write.] Three letters united in pronunciation so as to have but one sound, or to form but one syllable, as ieu in adieu; a triphthong.