- /-sisˈə/, also absciss or abscisse /abˈsis/ noun ( abscissae /ab-sisˈē or -sisˈī/, abscissˈas or abˈscisses) (mathematics)
1. The intercept between a fixed point and the foot of an ordinate
2. The x-co-ordinate in analytical geometry
- George Crabb in 1823 defined co-ordinates ( now dropping its hyphen ) as " a term applied to the absciss and ordinates when taken in connexion, " later better known as the magnitudes that determine the position of a point; geographers and navigators still later used coordinates to describe the use of longitude and latitude in locating a spot on the globe.