Definitions

1. noun

The horizontal coordinate or x-coordinate of a point in a plane or in a graph.

“The abscissa of the point was 3 on the x-axis.”

2. noun

The horizontal axis of a graph or coordinate system.

“The abscissa is the x-axis in the coordinate system.”

3. verb

To remove or cut off (something), especially a branch or a limb.

“The gardener had to abscissa the dead branch from the tree.”