ordinate; y-coordinate
Technical term in mathematics and coordinate geometry for the vertical coordinate in a Cartesian plane. Often contrasted with 横座標 (abscissa).
See also: 横座標
The ordinate of a point indicates its position on the y-axis.
On a graph, you need to check both the ordinate and the abscissa.
Compound of 縦 (vertical) and 座標 (coordinate). The reading たてざひょう follows standard rendaku voicing.