/ Dictionary / Index C coextrusion: Meaning and Definition of Find definitions for: co•ex•tru•sion Pronunciation: (kō"ik-str'zhun), [key] — n. Engin. simultaneous extrusion of two or more different yet compatible metals or plastics through the same die. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. coextensive cofactor Related Content Daily Word Quiz: soporific Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language