| Abscissa (n.) One of the elements of reference by which a point, as of a curve, is referred to a system of fixed rectilinear coordinate axes. Thesaurus Entries Cartesian coordinates, abscissa, apex, azimuth, ceiling, clearance, coordinates, cylindrical coordinates, declination, elevation, eminence, equator coordinates, exaltation, hauteur, height, heighth, highness, latitude, loftiness, longitude, ordinate, peak, perpendicular distance, polar coordinates, prominence, right ascension, stature, sublimity, summit, tallness, toploftiness |