/ Dictionary / Index N nickeline: Meaning and Definition of Find definitions for: nick•el•ine Pronunciation: (nik'u-lēn"), [key] — n. a usually massive, pale copper-red mineral, nickel arsenide, NiAs, with a metallic luster. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. nickeliferous nickelize Related Content Daily Word Quiz: deleterious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language