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a. A solid figure with a polygonal base and triangular faces that meet at a common point.
b. Something shaped like this polyhedron.
a. A massive monument of ancient Egypt having a rectangular base and four triangular faces culminating in a single apex, built over or around a crypt or tomb.
b. Any of various similar constructions, especially a four-sided Mesoamerican temple having stepped sides and a flat top surmounted by chambers.
3. The transactions involved in pyramiding stock.
4. Anatomy A structure or part suggestive of a pyramid in shape.
v. pyr·a·mid·ed, pyr·a·mid·ing, pyr·a·mids
1. To place or build in the shape of a pyramid.
2. To build (an argument or thesis, for example) progressively from a basic general premise.
3. To speculate in (stock) by making a series of buying and selling transactions in which paper profits are used as margin for buying more stock.
1. To assume the shape of a pyramid.
2. To increase rapidly and on a widening base.
3. To pyramid stocks.

[Latin pȳramis, pȳramid-, from Greek pūramis, of unknown origin.]

py·ram′i·dal (pĭ-răm′ĭ-dl), pyr′a·mid′ic (-mĭd′ĭk), pyr′a·mid′i·cal (-ĭ-kəl) adj.
py·ram′i·dal·ly adv.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.pyramidical - resembling a pyramid
pointed - having a point
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References in classic literature ?
It is moreover declared in his pyramidical silence.
In particular, he led me to a remarkable pyramidical structure some three yards square at the base, and perhaps ten feet in height, which had lately been thrown up, and occupied a very conspicuous position.
The aims and objectives of Short Service Commission are to address shortage of officers at Unit level, reducing promotional pressure in the pyramidical structure of the Armed Forces by way of early exit etc.
The author shares, "Unlike everywhere else in the world, the mosques in Kashmir have pyramidical three- tiered roofs and not domed ones.
Do we persist with independent businesses, compromising the pyramidical structure of Welsh rugby and reliant upon charitable benefactors and asset release payments?
The five unions believe it's crucial to the interests of the game in Europe that the unions are at the centre of governance of crossborder club competitions, given that rugby in each country is organised in a pyramidical structure.
Moby Dick's "identity," even "at a long distance," is recognized by knowledgeable sailors "even in the limitless, uncharted seas," by "a peculiar snow-white wrinkled forehead, and a high, pyramidical white hump.
However, some of the items confiscated from the suspect include incantations in different languages written in pyramidical form.