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Webster 1913 Edition

Adj.

Cut off; cut short; maimed.

(Min.)

Replaced, or cut off, by a plane, especially when equally inclined to the adjoining faces;

as, a

truncated

edge

(Zool.)

Lacking the apex; – said of certain spiral shells in which the apex naturally drops off.

Truncated cone

Truncated pyramid

(Geom.)

a cone or pyramid whose vertex is cut off by a plane, the plane being usually parallel to the base.

pp.

Cut off; cut short; maimed. A truncated cone is one whose vertex is cut off by a plane parallel to its base.

Appearing as if cut off; plane; having no edge; as a mineral substance.