abscissa
(æbˈsɪsə
) noun plural -scissas or -scissae (-ˈsɪsiː)
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-axis. Also : absciss, abscisse Compare
ordinate
[C17: New Latin, originally linea abscissa a cut-off line]