Pyramid \Pyr"a*mid\, v. t. (Speculation) To use, or to deal in, in a pyramiding transaction. See Pyramid, v. i.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Pyramid \Pyr"a*mid\, n. (Speculation) The series of operations involved in pyramiding. See Pyramid, v. i.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Pyramid \Pyr"a*mid\, v. i. (Speculation) To enlarge one's holding or interest in a series of operations on a continued rise or decline by using the profits to buy or sell additional amounts on a margin, as where one buys on a 10% margin 100 shares of stock quoted at 100, holds it till it rises to 105, and then uses the paper profit to buy 50 shares more, etc. The series of operations constitutes a pyramid.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Pyramid \Pyr"a*mid\, n. [L. pyramis, -idis, fr. Gr. ?, ?, of Egyptian origin: cf. F. pyramide.]

1. A solid body standing on a triangular, square, or polygonal base, and terminating in a point at the top; especially, a structure or edifice of this shape.

2. (Geom.) A solid figure contained by a plane rectilineal figure as base and several triangles which have a common vertex and whose bases are sides of the base.

3. pl. (Billiards) The game of pool in which the balls are placed in the form of a triangle at spot. [Eng.]

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)