trigram

American  

[trahy-gram] / ˈtraɪ græm /

noun

1. a sequence of three adjacent letters or symbols.

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Etymology

Origin of trigram

First recorded in 1600–10; tri- + -gram ¹

Example Sentences

Reliable statistical information can be compiled about common trigrams, precisely because they appear frequently.

From New York Times

But no existing body of data will ever be large enough to include all the trigrams that people might use, because of the continuing inventiveness of language.

From New York Times