/ Dictionary / Index A aerotropism: Meaning and Definition of Find definitions for: aer•ot•ro•pism Pronunciation: (â-ro'tru-piz"um), [key] — n. Biol. growth or movement in the direction of a supply of air or oxygen. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. aerotrain aeruginous Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language