Breadcrumb Home > Dictionary > Index E erbium: Meaning and Definition of Find definitions for: er•bi•um Pronunciation: (ûr'bē-um), [key] — n. Chem. a rare-earth metallic element, having pink salts. Symbol: Er; at. wt.: 167.26; at. no.: 68. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: erbium (Thesaurus) Erbil Erceldoune ✖ Related Content Daily Word Quiz: glissade Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language