/ Dictionary / Index A amaryllidaceous: Meaning and Definition of Find definitions for: am•a•ryl•li•da•ceous Pronunciation: (am"u-ril"i-dā'shus), [key] — adj. belonging to the plant family Amaryllidaceae. Cf. amaryllis family. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Amarna amaryllis Related Content Daily Word Quiz: gregarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language