/ Thesaurus / I Synonyms of ixodes pacificus Find synonyms for: Noun1. Ixodes pacificus, western black-legged tick, hard tick, ixodidusage: a tick that feeds on dusky-footed wood rat and bites humans; principal vector for Lyme disease in western United States especially northern CaliforniaWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: gregarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language