# Definition:Abscissa/Historical Note

## Historical Note on Abscissa

The term abscissa was used by Leonardo Fibonacci in his $1220$ work Practica Geometriae.

Some sources suggest that the word descends from translations of Conics by Apollonius.

Its use in the modern sense, as meaning the $x$ coordinate of a point in a Cartesian plane, may have been due to Stefano degli Angeli in his $1659$ work Miscellaneum Hyperbolicum, et Parabolicum.

The term entered the mathematical mainstream via the works of Gottfried Wilhelm von Leibniz, and some suggest that he may even have coined it.