Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of trigraph is as below...

Triphthong :: Triphthong (n.) A combination of three vowel sounds in a single syllable, forming a simple or compound sound; also, a union of three vowel characters, representing together a single sound; a trigraph; as, eye, -ieu in adieu, -eau in beau, are examples of triphthongs..

Trigraph :: Trigraph (n.) Three letters united in pronunciation so as to have but one sound, or to form but one syllable, as -ieu in adieu; a triphthong..

Trigram :: Trigram (n.) Same as Trigraph.

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