Word Study
trigrammatic
CIDE DICTIONARY
trigrammatic, a. [Gr. ; + a letter.].
Containing three letters or characters, or three sets of letters or characters. [1913 Webster]
ROGET THESAURUS
trigrammatic
Trisection
N trisection, tripartition, trichotomy, third, third part, trifid, trisected, tripartite, trichotomous, trisulcate, Triadelphous, triangular, tricuspid, tricapsular, tridental, tridentate, tridentiferous, trifoliate, trifurcate, trigonal, trigrammic, trigrammatic, tripetalous, tripodal, tripodic, triquetral, triquetrous.For further exploring for "trigrammatic" in Webster Dictionary Online