Search Result for "trigram": 
Wordnet 3.0

NOUN (1)

1. a word that is written with three letters in an alphabetic writing system;


The Collaborative International Dictionary of English v.0.48:

Trigram \Tri"gram\, n. [Pref. tri- + -gram.] Same as Trigraph. [1913 Webster]
WordNet (r) 3.0 (2006):

trigram n 1: a word that is written with three letters in an alphabetic writing system