Frustum /(?)/

Frus·tum

Frustum

n.

pl. Frusta, Frustums

  1. The part of a solid next the base, formed by cutting off the, top; or the part of any solid, as of a cone, pyramid, etc., between two planes, which may be either parallel or inclined to each other. (Geom.)
  2. One of the drums of the shaft of a column. (Arch.)