(astronomy) The axis of Earth between the celestial poles, important in ancient geocentric coordinate systems.

A chord progression, I–V–vi–IV, used in Western popular music, common since the 1970s.

(mathematics) Alternative form of coordinate axis

Alternative form of semimajor axis

(physics) A theorem that states the moment of inertia of a rigid body about any axis is equal to its moment of inertia about a parallel axis through its center of mass plus the product of the mass of the body and the square of the distance between the two parallel axes.

(physics) A theorem that states the moment of inertia of a planar lamina (i.e. 2-D body) about an axis perpendicular to the plane of the lamina is equal to the sum of the moments of inertia of the lamina about the two axes at right angles to each other, in its own plane intersecting each other at the point where the perpendicular axis passes through it.

Alternative form of axisymmetric

Exhibiting symmetry around an axis; exhibiting cylindrical symmetry.

Misspelling of axes. Mistakenly used for the plural of axis (“line around which object rotates”).

plural of axis (type of deer)