[fruhs-tuh
m] 
[-tuh] . Geometry. | 1. | the part of a conical solid left after cutting off a top portion with a plane parallel to the base. |
| 2. | the part of a solid, as a cone or pyramid, between two usually parallel cutting planes. |
frus·tum (frŭs'təm)  (click for larger image in new window) n. pl. frus·tums or frus·ta (-tə) Mathematics The part of a solid, such as a cone or pyramid, between two parallel planes cutting the solid, especially the section between the base and a plane parallel to the base. [Latin frūstum, piece broken off.] |
