axis1
/
ˈaksɪs/
n.
(pl. axes
/-siːz/
)
- an imaginary line about which a body rotates or with respect to which it possesses rotational symmetry.
- an imaginary line which divides something in half, especially in the direction of its greatest length.
- Mathematics a fixed reference line for the measurement of coordinates.
- a straight central part in a structure to which other parts are connected.
- Anatomy the second cervical vertebra, below the atlas at the top of the backbone.
-
(the Axis)
the alliance between Germany and Italy in the Second World War.
Etymology
ME: from L., ‘axle, pivot’.