pyramˈidal, pyramidˈic or pyramidˈical adjective

Having the form of a pyramid

pyramˈidally or pyramidˈically adverb

pyramidˈion noun

The small pyramidal apex of an obelisk

pyramˈidist or pyramidolˈogist noun

Someone who studies the Egyptian pyramids

pyramidolˈogy noun

pyramˈidon noun

An organ stop with pipes like inverted pyramids

pyrˈamis noun (pl pyramˈides /-i-dēz/ or pyrˈamises) (Shakespeare, etc)

A pyramid

pyramid of numbers noun

The relative decrease in numbers at each stage of a food chain, characteristic of animal communities

pyramid selling noun

A method of distributing goods by selling batches to agents who then sell batches at increased prices to sub-agents, and so on