axes.

The straight line, real or imaginary, passing through a body, or which it revolves, or may revolve; as the axis of the earth.

In geometry, a straight line in a plain figure, about which it revolves to produce a solid. AxXIS.

In conic sections, a right line dividing the section into two equal parts, and cutting all its ordinates at right angles.

In mechanics, the axis of a balance is that line about which it moves, or rather turns. AX!IS. The axis of oscillation is a right line parallel to the horizon passing through the center, about which a pendulum vibrates. The axis in peritrochio is a wheel concentric with the base of a cylinder, and movable with it about its axis.

In optics, a particular ray of light from any object which falls perpendicularly on the eye. AX!IS.

In architecture, spiral axis is the axis of a twisted column spirally drawn in order to trace the circumvolutions without. Aris of the lonic capital is a line passing perpendicularly through the middle of the eye of the volute. The axis of a vessel is an imaginary line passing through the middle of it, perpendicular to its base, and equally distant from its sides. In botany, axis is a taper column in the center of some flowers or catkins, about which the other parts are disposed. AxXIS. In anatomy, axis is the name of the second verteber of the neck; it has a tooth which enters into the first verteber, and this tooth is by some called the axis.