If x and y are horizontal, z is vertical; if x and z are horizontal, y is vertical. The words horizontal and vertical are generally used in a planar (2-dimensional) sense, not spatial (3-dimensional). Which is the reason you may not find a word corresponding to the third dimension along with horizontal and vertical.
single word requests - X, Y, Z — horizontal, vertical and ...
This would answer the original title of the question, which only specified synonyms for "horizontal" and "vertical" -- they're all directions. There can be many cells that are orthogonal, but not necessarily neighboring/touching.
Is there one word for both horizontal or vertical, but not diagonal ...
Is there a single, more generic term that can be used to describe both a row and a column? In English, we can refer to a line as being horizontal or vertical, but unless we say ‘a line of something’,
Mullioned windows are windows divided into panes by inner frames. The vertical frames are called mullions. What do we call the horizontal frames?
I want to work with the terms horizontal/vertical, but there's no term I can find to describe the z axis. Furthermore, from what I've read, many people define the horizontal direction as being the horizontal and vertical direction, with height being described as the vertical direction i.e, horizontal = area, vertical = height.
If I want to speak of North, South, East, West in a general sense I could, for example, use the term cardinal direction. Which term is appropriate to sum up horizontal and vertical in the same man...
The convention is that x would occupy the horizontal axis, while y occupies the vertical axis, regardless if x is plotted against y, or y against x. Visually, which often would appear mutually indiscriminatable for 1-1 mapping plots.
2 'Horizontal' means 'relating to the horizon', so strictly speaking whether a split is vertical or horizontal depends on its orientation relative to the ground. Or less strictly, 'horizontal' is whatever the observer considers to be left/right rather than up/down.