/ Dictionary / Index N niobate: Meaning and Definition of Find definitions for: ni•o•bate Pronunciation: (nī'u-bāt"), [key] — n. Chem. any salt of niobic acid; columbate. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Ninus Niobe 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