/ Dictionary / Index E epiphyllum: Meaning and Definition of Find definitions for: ep•i•phyl•lum Pronunciation: (ep"u-fil'um), [key] — n. any of several mostly epiphytic cacti of the genus Epiphyllum, native to tropical America, having large, fragrant white flowers. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: epiphyllum (Thesaurus) epiphyll epiphysis Related Content Daily Word Quiz: pudgy Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language