/ Dictionary / Index E epilimnion: Meaning and Definition of Find definitions for: ep•i•lim•ni•on Pronunciation: (ep"u-lim'nē-on", -un), [key] — pl. -ni•a (in certain lakes) the layer of water above the thermocline. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. epileptic epilithic Related Content Daily Word Quiz: fabricate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language