DICT.TW Dictionary Taiwan

 Trun·ca·ted a.
 1. Cut off; cut short; maimed.
 2. Min. Replaced, or cut off, by a plane, especially when equally inclined to the adjoining faces; as, a truncated edge.
 3. Zool. Lacking the apex; -- said of certain spiral shells in which the apex naturally drops off.
 Truncated cone or Truncated pyramid Geom., a cone or pyramid whose vertex is cut off by a plane, the plane being usually parallel to the base.
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 truncated pyramid
      n : a frustum formed from a pyramid