| pyracanth | (noun) any of various thorny shrubs of the genus Pyracantha bearing small white flowers followed by hard red or orange-red berries | Synonyms: fire thorn, firethorn, Pyracantha |
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| pyralid | (noun) usually tropical slender-bodied long-legged moth whose larvae are crop pests | Synonyms: pyralid moth |
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| pyramid | (noun) (stock market) a series of transactions in which the speculator increases his holdings by using the rising market value of those holdings as margin for further purchases | - |
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| (noun) a polyhedron having a polygonal base and triangular sides with a common vertex | - |
| (verb) increase rapidly and progressively step by step on a broad base | - |
| (verb) arrange or build up as if on the base of a pyramid | - |
| (verb) enlarge one's holdings on an exchange on a continued rise by using paper profits as margin to buy additional amounts | - |
| (verb) use or deal in (as of stock or commercial transaction) in a pyramid deal | - |
| pyramidal | (adjective) resembling a pyramid | Synonyms: pyramidic, pyramidical |
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| pyramidic | (adjective) resembling a pyramid | Synonyms: pyramidal, pyramidical |
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| pyramidical | (adjective) resembling a pyramid | Synonyms: pyramidal, pyramidic |
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| pyramidically | (adverb) in a pyramidal manner or shape | - |
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| pyramiding | (noun) a fraudulent business practice involving some form of pyramid scheme e.g., the chain of distribution is artificially expanded by an excessive number of distributors selling to other distributors at progressively higher wholesale prices until retail prices are unnecessarily inflated | - |
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