Breadcrumb Home > Dictionary > Index A abscissa: Meaning and Definition of Find definitions for: ab•scis•sa Pronunciation: (ab-sis'u), [key] — pl. -scis•sas, -scis•sae (in plane Cartesian coordinates) the x-coordinate of a point: its distance from the y-axis measured parallel to the x-axis. Cf. ordinate. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: abscissa (Thesaurus) abscisic acid abscission TrendingHere are the facts and trivia that people are buzzing about. Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 12 Steps to a New Year New Year's Resolution to Slim Down? Martin Luther King Speeches Books of the Bible: Old Testament Books in Order ✖ Related Content Daily Word Quiz: ennui Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language