The Collaborative International Dictionary
Triliteral
Triliteral \Tri*lit"er*al\, a. [Pref. tri- + literal.] Consisting of three letters; trigrammic; as, a triliteral root or word. -- n. A triliteral word.
Wiktionary
triliteral
a. Used to describe word roots in Semitic languages which consist of three letters n. A word root in a Semitic language which consists of three letters
Usage examples of "triliteral".
It was there that I learnt the double guttural of the Beni Mzab Hebrew and that I became thoroughly at home with the triliteral roots of the Berber.