/ Dictionary / Index O oval of Cassini: Meaning and Definition of Find definitions for: o'val of Cassi'ni Pronunciation: [key] — Geom. Geom. the locus of a point such that the product of the distances from the point to two fixed points is constant. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Ovalle Oval Office Related Content Daily Word Quiz: malady Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language