Trigraph

Definitions

  • Webster's Revised Unabridged Dictionary
    • n Trigraph Three letters united in pronunciation so as to have but one sound, or to form but one syllable, as -ieu in adieu; a triphthong.
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Century Dictionary and Cyclopedia
    • n trigraph A combination of three letters to represent one sound; a triphthong, as eau in beau.
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Chambers's Twentieth Century Dictionary
    • n Trigraph trī′graf a combination of three letters sounded as one, a triphthong.
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Etymology

Webster's Revised Unabridged Dictionary
Pref. tri-, + -graph,
Chambers's Twentieth Century Dictionary
Gr. tri, tris, thrice, and graphē, a writing—graphein, to write.