/ Dictionary / Index H heliotropism: Meaning and Definition of Find definitions for: he•li•ot•ro•pism Pronunciation: (hē"lē-o'tru-piz"um, hē"lē-u-trō'piz-um), [key] — n. heliotropic tendency or growth. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: heliotropism (Thesaurus) heliotropin heliotype Related Content Daily Word Quiz: pundit Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language