Axis of the

Related to Axis of the: Y axis
the diameter of the sphere which is perpendicular to the plane of the circle.

See also: Axis

References in classic literature ?
In the same way, the angle formed by the rope with the vertical axis of the machine, indicates the velocity.
The steel rod connecting the spring with the propeller was suddenly jerked out of place, at the car end, (by a swaying of the car through some movement of one of the two seamen we had taken up,) and in an instant hung dangling out of reach, from the pivot of the axis of the screw.
Towards the stern of the boat it is spirally coiled away in the tub, not like the worm-pipe of a still though, but so as to form one round, cheese-shaped mass of densely bedded sheaves, or layers of concentric spiralizations, without any hollow but the heart, or minute vertical tube formed at the axis of the cheese.
A straight line drawn through the axis of the piece would have passed through the center of the orb of night.
Instruments on Earth can measure the tilt of the axis of the sun's magnetic field not only far from the sun but also at the photosphere, its visible surface.