n.pl. ab·scis·sas or ab·scis·sae(-sise)
Symbol xThe coordinate representing the position of a point along a line perpendicular to the y-axis in a plane Cartesian coordinate system.
[New Latin(linea) abscissa, (line) cut off, fromLatinabscissa, feminine past participle ofabscindere, to abscise; see ABSCISSION.]
(click for a larger image)abscissa
The coordinates for A are (4,3); the abscissa is 4 and the ordinate is 3.
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