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abscissa

[ab-sis-uh]
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noun, plural ab·scis·sas, ab·scis·sae [ab-sis-ee] /æbˈsɪs i/. Mathematics.
  1. (in plane Cartesian coordinates) the x-coordinate of a point: its distance from the y-axis measured parallel to the x-axis.
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Compare ordinate.

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. 2018

British Dictionary definitions for abscissae

abscissa

noun plural -scissas or -scissae (-ˈsɪsiː)
  1. the horizontal or x -coordinate of a point in a two-dimensional system of Cartesian coordinates. It is the distance from the y -axis measured parallel to the x -axisCompare ordinate
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Word Origin

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

Word Origin and History for abscissae

abscissa

n.

1690s, from Latin abscissa (linea) "(a line) cut off," from fem. past participle of abscindere "to cut off," from ab- "off, away" (see ab-) + scindere "to cut" (see shed (v.)).

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Online Etymology Dictionary, © 2010 Douglas Harper

abscissae in Science

abscissa

[ăb-sĭsə]
Plural abscissas abscissae (ăb-sĭsē)
  1. 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.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.