2. (Min.) Replaced, or cut off, by a plane, especially when equally inclined to the adjoining faces; as, a truncated edge. [ 1913 Webster ]
3. (Zool.) Lacking the apex; -- said of certain spiral shells in which the apex naturally drops off. [ 1913 Webster ]
Truncated coneor Truncated pyramid (Geom.), a cone or pyramid whose vertex is cut off by a plane, the plane being usually parallel to the base. [ 1913 Webster ]
(adj) terminating abruptly by having or as if having an end or point cut off, Syn.truncated, Example: a truncate leaf; truncated volcanic mountains; a truncated pyramid
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