n.
Pronunciation: ' fr ə s-t ə m
Function: noun
Inflected Form: plural frustums or frus · ta \ -t ə \
Etymology: New Latin, from Latin, piece, bit ― more at BRUISE
Date: 1658
: the basal part of a solid cone or pyramid formed by cutting off the top by a plane parallel to the base also : the part of a solid intersected between two usually parallel planes