noun[ C ]uk/ˈfrʌs.təm/us/ˈfrʌs.təm/frusta/ˈfrʌs.tə//ˈfrʌs.tə/frustums
mathematicsspecialized平截头体,截头锥体
the part of a solid shape such as a cone that is between the base of the shape and a parallel plane through the shape or between two parallel planes through the shape