pyramid


1pyr·a·mid

noun \ˈpir-ə-ˌmid\

: a very large structure built especially in ancient Egypt that has a square base and four triangular sides which form a point at the top

: a shape, object, or pile that is wide near the bottom and narrows gradually as it reaches the top

: something that resembles a pyramid in the way its parts are arranged or organized

Full Definition of PYRAMID

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 \pə-ˈra-mə-dəl, ˌpir-ə-ˈmi-\ adjective
py·ra·mi·dal·ly adverb
pyr·a·mid·i·cal \ˌpir-ə-ˈmi-di-kəl\ adjective

Examples of PYRAMID

  1. the ancient pyramids of Egypt

Illustration of PYRAMID

Origin of PYRAMID

Latin pyramid-, pyramis, from Greek
First Known Use: 1549

Other Archaeology Terms

Attic, Byzantine, Paleolithic, cairn, core, flint, horizon, neolithic, shard, stratum

2pyramid

verb

Definition of PYRAMID

intransitive verb
1
:  to speculate (as on a security or commodity exchange) by using paper profits as margin for additional transactions
2
:  to increase rapidly and progressively step by step on a broad base
transitive verb
1
:  to arrange or build up as if on the base of a pyramid
2
:  to use (as profits) in speculative pyramiding
3
:  to increase the impact of (as a tax assessed at the production level) on the ultimate consumer by treating as a cost subject to markup

First Known Use of PYRAMID

circa 1900

pyr·a·mid

noun \ˈpir-ə-ˌmid\   (Medical Dictionary)

Medical Definition of PYRAMID

1
: a polyhedron having for its base a polygon and for faces triangles with a common vertex
2
: an anatomical structure resembling a pyramid: as a : renal pyramid b : either of two large bundles of motor fibers from the cerebral cortex that reach the medulla oblongata and are continuous with the corticospinal tracts of the spinal cord c : a conical projection making up the central part of the inferior vermis of the cerebellum

pyramid

noun    (Concise Encyclopedia)

Ancient monumental structure constructed of or faced with stone or brick and having a rectangular base and four sloping triangular sides meeting at an apex. Pyramids have been built at various times and places; the best-known are those of Egypt and of Central and South America. The pyramids of ancient Egypt were royal tombs. Each contained an inner sepulchral chamber that housed the deceased (usually mummified) ruler, members of his entourage, and artifacts. The rest of the pyramid complex consisted of a large enclosure, an adjacent mortuary temple, and a causeway leading down to a pavilion. About 80 royal pyramids survive in Egypt, the greatest being those at Giza. American pyramids include the pyramids of the Sun and Moon at Teotihuacán, the Castillo at Chichén Itzá, and various Inca and Chimú structures in Andean settlements. These pyramids were generally built of earth and faced with stone; they are typically stepped pyramids and are topped by a platform or temple structure used for rituals, including human sacrifice.

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