noun
coordinate axis
Technical term in mathematics and geometry; refers to one of the axes in a coordinate system (e.g., x-axis, y-axis).
グラフの座標軸にラベルを付ける。
Label the coordinate axes of the graph.
この座標軸は対数目盛になっている。
This coordinate axis has a logarithmic scale.
Compound of 座標 (coordinates) and 軸 (axis). The exact historical derivation is uncertain, but the term is a straightforward technical compound.