/ Dictionary / Index M methylene iodide: Meaning and Definition of Find definitions for: meth'ylene i'odide Pronunciation: [key] a yellow liquid, CHI, soluble in alcohol and ether: used for the separation of mixtures of minerals and in organic synthesis. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. methylene group methyl ethyl ketone Related Content Daily Word Quiz: immense Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language