/ Dictionary / Index O osculating plane: Meaning and Definition of Find definitions for: os'culating plane' Pronunciation: [key] — Math. Math. the plane containing the circle of curvature of a point on a given curve. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. osculating circle osculation Related Content Daily Word Quiz: portent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language