/ Dictionary / Index C copperon: Meaning and Definition of Find definitions for: cop•per•on Pronunciation: (kop'u-ron"), [key] — n. Chem. cupferron. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. copper naphthenate copperplate Related Content Daily Word Quiz: reluctant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language