family Trichodontidae fa·mi·lyt·richodontidae uncommon noun 1. two species of elongate compressed scaleless large-eyed fishes that live in sand or mud SynonymsTrichodontidaefamily Trichodontidae Related words Broader terms fish family Parts Perciformes Part of sandfish WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.