Definitions
1.NounThe space between two axes.
2.NounA line from the center of a regular solid to the center of one of its edges.
3.NounThe distance between the axes (centers of rotation) of two items that interact along a spiral groove, such as intermeshing screws or a vinyl record and needle.
4.AdjectiveBetween axes (any sense).
5.AdjectivePertaining to the perpendicularity (or deviation therefrom) of a set of resolver windings when another set of windings is excited.