/ Dictionary / Index T thermotropism: Meaning and Definition of Find definitions for: ther•mot•ro•pism Pronunciation: (thur-mo'tru-piz"um), [key] — n. Biol. oriented growth of an organism in response to heat. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: thermotropism (Thesaurus) thermotherapy -thermy Related Content Daily Word Quiz: frugal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language