Truncate \Trun"cate\, v. t. [imp. & p. p. Truncated; p. pr. & vb. n. Truncating.]

[L. truncatus, p. p. of truncare to cut off, mutilate, fr. truncus maimed, mutilated, cut short. See Trunk.]

To cut off; to lop; to maim.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Truncated \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. (Zo["o]l.) Lacking the apex; -- said of certain spiral shells in which the apex naturally drops off.

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

Source: Webster's Revised Unabridged Dictionary (1913)