An example of an abscissa is the measurement along the y-axis parallel with the x-axis to point p.
nounpl. -·sas or -·sae
Origin of abscissaClassical Latin abscissa (linea), (a line) cut off, feminine of abscissus, past participle of abscindere, to cut off from ab-, from, off + scindere, to cut from Indo-European an unverified form skei-: for base see saw
nounpl. ab·scis·sas, or ab·scis·sae
Origin of abscissaNew Latin (līnea) abscissa (line) cut off from Latin abscissa feminine past participle of abscindere to abscise ; see abscission .
The coordinates for A are (4,3); the abscissa is 4 and the ordinate is 3.
(plural abscissas or abscissae or abscissæ)
- (geometry) The first of the two terms by which a point is referred to, in a system of fixed rectilinear coordinate (Cartesian coordinate) axes. The abscissa is also known as the "x" coordinate of a point, shown on the horizontal line, with the ordinate, also known as the "y" coordinate, shown on the vertical line. [First attested in the late 17th century.]
- The point has 3 as its abscissa and 2 as its ordinate.
Originally, it referred to the portion of a line between a fixed point on that line and the intersection of that line with an ordinate.