/ Thesaurus / P Synonyms of periodical cicada Find synonyms for: Noun1. seventeen-year locust, periodical cicada, Magicicada septendecim, cicada, cicalausage: North American cicada; appears in great numbers at infrequent intervals because the nymphs take 13 to 17 years to matureWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: philanthropy Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language