/ Dictionary / Index E epiphylaxis: Meaning and Definition of Find definitions for: ep•i•phy•lax•is Pronunciation: (ep"u-fī-lak'sis, -fi-), [key] — n. Med. reinforcement of the defenses of the body against disease. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. epiphragm epiphyll Related Content Daily Word Quiz: arid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language