/ Dictionary / Index A atamasco lily: Meaning and Definition of Find definitions for: at'a•mas'co lil'y Pronunciation: (at'u-mas'kō, at"-), [key] a plant, Zephyranthes atamasco, of the amaryllis family, of the southeastern U.S., bearing a single white lilylike flower sometimes tinged with purple. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. ataman atar Related Content Daily Word Quiz: mamba Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language