/ Dictionary / Index T thigmotropism: Meaning and Definition of Find definitions for: thig•mot•ro•pism Pronunciation: (thig-mo'tru-piz"um), [key] — n. Biol. oriented growth of an organism in response to mechanical contact, as a plant tendril coiling around a string support. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. thigmotaxis thill Related Content Daily Word Quiz: feline Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language