Answer: frusta

AnswerCrossword Clue
FRUSTAPlane parts?
FRUSTACones with their tips cut off
FRUSTAConic sections?
FRUSTAParts of solids between parallel planes
FRUSTATruncated cones, in math
frustathe part of a solid, as a cone or pyramid, between two usually parallel cutting planes
frustathe part of a conical solid left after cutting off a top portion with a plane parallel to the base
frustaFRUSTUM, a cone with its top cut of