noun, plural ab·scis·sas, ab·scis·sae [ab-sis-ee] /æbˈsɪs i/. Mathematics.
(in plane Cartesian coordinates) the x-coordinate of a point: its distance from the y-axis measured parallel to the x-axis.
Origin of abscissa
1690–1700; feminine of Latin abscissus (past participle of abscindere to abscind)
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
noun plural -scissas or -scissae (-ˈsɪsiː)
Word Origin for abscissa
C17: New Latin, originally linea abscissa a cut-off line
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Online Etymology Dictionary, © 2010 Douglas Harper
Plural abscissas abscissae (ăb-sĭs′ē)
The distance of a point from the y-axis on a graph in the Cartesian coordinate system. It is measured parallel to the x-axis. For example, a point having coordinates (2,3) has 2 as its abscissa. Compare ordinate.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.