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. (Zoöl.) Lacking the apex; — said of certain spiral shells in which the apex naturally drops off.
Truncated coneorpyramid(Geom.), a cone or pyramid whose vertex is cut off by a plane, the plane being usually parallel to the base.