/ Dictionary / Index A aerenchyma: Meaning and Definition of Find definitions for: aer•en•chy•ma Pronunciation: (â-reng'ku-mu, â-ren'-), [key] — n. Bot. a tissue in certain aquatic plants, consisting of thin-walled cells and large intercellular spaces adapted for internal circulation of air. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. aerator aere perennius* Related Content Daily Word Quiz: immense Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language