Trigraph Definition
trīgrăf
noun
A group of three letters representing one sound (Ex.: pph in Sappho)
Webster's New World
A group of three letters, especially of frequent occurrence in a given language, as the or ing in English or gli in Italian.
American Heritage
Any combination of three letters of an alphabet.
American Heritage
Other Word Forms of Trigraph
Noun
Singular:
trigraph
Plural:
trigraphsOrigin of Trigraph
tri- +"Ž -graph
From Wiktionary
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