/ Thesaurus / G Synonyms of genus phthirus Find synonyms for: Noun1. Phthirius, genus Phthirius, Phthirus, genus Phthirus, arthropod genususage: true lice: crab liceWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: chicory Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language