/ Dictionary / Index E ecdysone: Meaning and Definition of Find definitions for: ec•dy•sone Pronunciation: (ek'du-zōn", -sōn"), [key] — n. an insect hormone that stimulates metamorphosis. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. ecdysis ecesis Related Content Daily Word Quiz: supercilious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language