What is three letters united in pronunciation so as to have but one sound, or to form but one syllable, as -ieu in adieu; a triphthong called?
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. (Webster's 1913.)
Sources
- Webster's Unabridged Dictionary, 1913 edition (public domain, via GCIDE / Project Gutenberg).
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- Published: 2026-07-17T00:00:00-07:00 · Modified: 2026-07-17T00:00:00-07:00