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Pronunciation: (pir'u-mid), [key]
1. Archit.
2. anything of such form.
3. a number of persons or things arranged or heaped up in this manner: a pyramid of acrobats; a pyramid of boxes.
4. a system or structure resembling a pyramid, as in hierarchical form.
5. Geom.a solid having a polygonal base, and triangular sides that meet in a point.
6. Crystall.any form the planes of which intersect all three of the axes.
7. Anat., Zool.any of various parts or structures of pyramidal form.
9. a tree pruned or trained to grow in conical form.
10. pyramids, (used with a sing. v.) Brit.a form of pocket billiards for two or four players in which 15 colored balls, initially placed in the form of a triangle, are pocketed with one white cue ball.

1. to take, or become disposed in, the form of a pyramid.
3. to increase gradually, as with the completion of each phase: Our problems are beginning to pyramid.

1. to arrange in the form of a pyramid.
2. to raise or increase (costs, wages, etc.) by adding amounts gradually.
3. to cause to increase at a steady and progressive rate: New overseas markets have pyramided the company's profits.
4. Stock Exchange.(in speculating on margin) to operate in, or employ in, pyramiding.


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