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.

Context Explanation

single word requests - X, Y, Z — horizontal, vertical and ... According to Wikipedia's architectural drawing page: A cross section, also simply called a section, represents a vertical plane cut through the object, in the same way as a floor plan is a horizontal section viewed from the top. This would suggest that section is only appropriate for vertical planes. However, section is more generally defined as, per dictionary.com: a representation of an ...

Insight Material

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’, Is there one word for both horizontal or vertical, but not diagonal, adjacency? Ask Question Asked 11 years, 11 months ago Modified 1 year, 11 months ago Is there one word for both horizontal or vertical, but not diagonal ... The intersection of the vertical plane with the horizontal plane would form a transverse. This medical definition from thefreedictionary.com describes: transverse plane of space, n an imaginary plane that cuts the body in two, separating the superior half from the inferior half, and that lies at a right angle from the body's vertical axis.

Final Conclusion

Mullioned windows are windows divided into panes by inner frames. The vertical frames are called mullions. What do we call the horizontal frames?