/ Dictionary / Index N Ninus: Meaning and Definition of Find definitions for: Ni•nus Pronunciation: (nī'nus), [key] — n. the legendary husband of Semiramis and founder of Nineveh. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Ninurta niobate Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language