/ Dictionary / Index B binormal: Meaning and Definition of Find definitions for: bi•nor•mal Pronunciation: (bī'nôr"mul, bī-nôr'-), [key] — n. Geom. the normal to a curve, lying perpendicular to the osculating plane at a given point on the curve. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. binomial theorem binoxalate 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