SPINDLE

, in Geometry, a solid body generated by the revolution of some curve line about its base or double ordinate AB; in op- position to a conoid, which is generated by the rotation of the curve about its axis or absciss, perpendicular to its ordinate.

The Spindle is denominated circular, elliptic, hyperbolic, or parabolic, &c, according to the figure of its generating curve. See my Mensur. in several places.

, in Mechanics, sometimes denotes the axis of a wheel, or roller, &c; and its ends are the pivots.

See also Double Cone.