How to refer to a set of lines where each line is either parallel to $x$-axis or $y$-axis

Question

Suppose that there are $k$ lines on the plane that are parallel to $x$-axis along with $m$ lines parallel to $y$-axis, not necessarily spaced equally.

Is there a technical term for these kind of line sets? My intention is to refer to them as parallel-orthogonal straight lines but it does not make any sense.

Answer 1

How about "axes-parallel"?

--- rk

Answer 2

Horizontal for parallel to $x-axis$ and vertical for parallel to $y-axis.$