/ Dictionary / Index J juvenile hormone: Meaning and Definition of Find definitions for: ju'venile hor'mone Pronunciation: [key] — Biochem. Biochem. any of a class of insect and plant hormones acting to inhibit the molting of a juvenile insect into its adult form. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. juvenile delinquent juvenile officer Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language