/ Dictionary / Index B biannulate: Meaning and Definition of Find definitions for: bi•an•nu•late Pronunciation: (bī-an'yoo-lit, -lāt"), [key] — adj. Zool. having two ringlike bands, as of color. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. biannual Biarritz Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language