可数名词：

1.（古埃及的）金字塔

2.【几何】椎体；棱锥体

3.金字塔形的物体（或一堆东西）

4.金字塔式的组织（或系统）

词形变化

形容词pyramidal

英语解释

enlarge one's holdings on an exchange on a continued rise by using paper profits as margin to buy additional amounts

increase rapidly and progressively step by step on a broad base

arrange or build up as if on the base of a pyramid

use or deal in (as of stock or commercial transaction) in a pyramid deal

a massive monument with a square base and four triangular sides; begun by Cheops around 2700 BC as royal tombs in ancient Egypt

(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

a polyhedron having a polygonal base and triangular sides with a common vertex