/ Dictionary / Index M medial moraine: Meaning and Definition of Find definitions for: me'dial moraine' Pronunciation: [key] a ridge of glacial drift formed by the junction of two converging valley glaciers. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. medial median Related Content Daily Word Quiz: knead Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language