(archaic) <span class="searchmatch">trigrammatic</span> (not comparable) Containing three letters or characters, or three sets of letters or characters. trigram “<span class="searchmatch">trigrammatic</span>”, in Webster’s...
trigrammic (not comparable) (rare) Archaic form of <span class="searchmatch">trigrammatic</span>. “trigrammic”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C....