abscissa
noun
- first coordinate in a measured space with dimension 1 or higher
Wiktionary
Pronunciation: /æbˈsɪs.ə/
noun
Etymology: By ellipsis from Latin [linea] abscissa, feminine of abscissus, perfect passive participle of abscindō (“cut off”). See abscind.
- The first of the two terms by which a point is referred to, in a system of fixed rectilinear coordinate (Cartesian coordinate) axes.
“The point (3,2) has 3 as its abscissa and 2 as its ordinate.”
- The horizontal line representing an axis of a Cartesian coordinate system, on which the abscissa (sense above) is shown.