/ Dictionary / Index N niobous: Meaning and Definition of Find definitions for: ni•o•bous Pronunciation: (nī-ō'bus), [key] — adj. containing trivalent niobium, as niobous chloride, NbCl. of or pertaining to niobium. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. niobium Niobrara Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language