Meaning of PYRAMID in English


Pronunciation: ' pir- ə - ˌ mid

Function: noun

Etymology: Latin pyramid-, pyramis, from Greek

Date: 1549

1 a : an ancient massive structure found especially in Egypt having typically a square ground plan, outside walls in the form of four triangles that meet in a point at the top, and inner sepulchral chambers b : a structure or object of similar form

2 : a polyhedron having for its base a polygon and for faces triangles with a common vertex ― see VOLUME table

3 : a crystalline form each face of which intersects the vertical axis and either two lateral axes or in the tetragonal system one lateral axis

4 : an anatomical structure resembling a pyramid: as a : any of the conical masses that project from the renal medulla into the kidney pelvis b : either of two large bundles of motor fibers from the cerebral cortex that reach the medulla oblongata and are continuous with the pyramidal tracts of the spinal cord

5 : an immaterial structure built on a broad supporting base and narrowing gradually to an apex <the socioeconomic pyramid >

– py · ra · mi · dal \ p ə - ' ra-m ə -d ə l, ˌ pir- ə - ' mi- \ adjective

– py · ra · mi · dal · ly adverb

– pyr · a · mid · i · cal \ ˌ pir- ə - ' mi-di-k ə l \ adjective


Merriam Webster Collegiate English Dictionary.      Merriam Webster - Энциклопедический словарь английского языка.