/ Dictionary / Index S seventeen-year locust: Meaning and Definition of Find definitions for: sev'en•teen'-year lo'cust Pronunciation: (sev'un-tēn'yēr"), [key] a cicada, Magicicada septendecim, of the eastern U.S., having nymphs that live in the soil, usually emerging in great numbers after 17 years in the North or 13 years in the South. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Seventeenth Amendment seventh Related Content Daily Word Quiz: fervor Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language