/ Dictionary / Index A abscission zone: Meaning and Definition of Find definitions for: abscis'sion zone" Pronunciation: [key] — Bot. Bot. the zone at the base of a leaf petiole, fruit stalk, or branch in which the abscission layer develops. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. abscission layer abscond 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