abscissa
n. C1 Advanced ab·scis·sa
n. the horizontal line on a graph used to show the position of a point. It is the first number in a pair of coordinates.
n. the horizontal coordinate in a two-dimensional system, typically representing the independent variable or the x-axis.
The abscissa shows the time of day on this graph.
To plot the data correctly, you must ensure the abscissa represents the correct range of values.
In the Cartesian plane, the abscissa is paired with the ordinate to define the exact location of a point relative to the origin.
By ellipsis from Latin [linea] abscissa, feminine of abscissus, perfect passive participle of abscindō (“cut off”). See abscind.