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pyramid

 
Dictionary: pyr·a·mid   (pĭr'ə-mĭd) pronunciation
n.
    1. A solid figure with a polygonal base and triangular faces that meet at a common point.
    2. Something shaped like this polyhedron.
    1. A massive monument of ancient Egypt having a rectangular base and four triangular faces culminating in a single apex, built over or around a crypt or tomb.
    2. Any of various similar constructions, especially a four-sided Mesoamerican temple having stepped sides and a flat top surmounted by chambers.
  1. The transactions involved in pyramiding stock.
  2. Anatomy. A structure or part suggestive of a pyramid in shape.

v., -mid·ed, -mid·ing, -mids.

v.tr.
  1. To place or build in the shape of a pyramid.
  2. To build (an argument or thesis, for example) progressively from a basic general premise.
  3. To speculate in (stock) by making a series of buying and selling transactions in which paper profits are used as margin for buying more stock.
v.intr.
  1. To assume the shape of a pyramid.
  2. To increase rapidly and on a widening base.
  3. To pyramid stocks.

[Latin pȳramis, pȳramid-, from Greek pūramis, probably of Egyptian origin.]

pyramidal py·ram'i·dal (pĭ-răm'ĭ-dl) or pyr'a·mid'ic (-mĭd'ĭk) or pyr'a·mid'i·cal (-ĭ-kəl) adj.
pyramidally py·ram'i·dal·ly adv.

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Dental Dictionary: pyramidal
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(pǐ-ram′ ǐ-dəl)
adj

Having the shape that is peculiar to a pyramid (i.e., a solid with polygonal base and triangular faces that meet at a common point).

 
pyramid, in geometry, solid figure bounded by a polygon (the base, or directrix) and the surface generated by a moving line (the generator) passing through a fixed point (vertex) and continually intersecting the perimeter of the polygon. The surface, or lateral faces, of the pyramid are triangles having as a common vertex the vertex of the pyramid; in a regular pyramid the base is a regular polygon and the lateral faces are congruent triangles. The altitude of a pyramid is the perpendicular distance from the vertex to the base. The volume of a pyramid is equal to one third the product of the altitude and the area of the base. The frustum is the portion of a pyramid between the base and a plane parallel to the base cutting the pyramid into two parts.


Veterinary Dictionary: pyramidal
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Shaped like a pyramid.

  • p. disease — abnormal growth of the wall of the hoof in the horse in which the vertical midline of the front of the hoof bulges, causing lameness. Caused by fracture of the extensor process of the third phalanx or by low ringbone.
  • p. nervous system — pyramidal-shaped nerve cells in the cerebral cortex and their efferent neurons to skeletal muscles.
  • p. tracts — collections of motor nerve fibers arising in the brain and passing down through the spinal cord to motor cells in the ventral horns.
Word Tutor: pyramid
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pronunciation

IN BRIEF: A solid figure whose sloping sides are triangles that come together in a point at the top.

pronunciation No one knows for sure who built the world's largest pyramid. — Guillaume Apollinaire (1880-1918)

Wikipedia: Pyramid
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Pyramid of Khafra

A pyramid is a building where the outer surfaces are triangular and converge at a point. The base of a pyramid can be trilateral, quadrilateral, or any polygon shape, meaning that a pyramid has at least four faces (base plus at least three triangular faces). The five-face square pyramid is a common version.

A pyramid's design, with the majority of the weight closer to the ground,[1] means that less material higher up on the pyramid will be pushing down from above: this distribution of weight allowed early civilizations to create stable monumental structures.

For thousands of years, the largest structures on Earth were pyramids: first the Red Pyramid in the Dashur Necropolis and then the Great Pyramid of Khufu, the only one of the Seven Wonders of the Ancient World still remaining and still the tallest pyramid of all. The largest pyramid ever built, by volume, is the Great Pyramid of Cholula, in the Mexican state of Puebla. This pyramid is still being excavated.

Contents

Ancient monuments

Pyramid-shaped structures were built by many ancient civilizations.

Mesopotamia

The Mesopotamians built the earliest pyramidal structures, called ziggurats. In ancient times these were brightly painted. Since they were constructed of mud-brick, little remains of them.

Egypt

The ancient pyramids of Egypt

The most famous pyramids are the Egyptian pyramids[citation needed] — huge structures built of brick or stone, some of which are among the world's largest constructions. The age of the pyramids reached zenith at Giza in 2575-2150 B.C.[2] There are 138 pyramids discovered in Egypt as of 2008.[3][4] The Great Pyramid of Giza is the largest in Egypt and one of the largest in the world. Until Lincoln Cathedral was built in 1400 AD, it was the tallest building in the world. The base is over 52,600 square meters in area. Egypt has the most pyramids in the world, with Sudan coming in at a close second.

It was one of the Seven Wonders of the World, and the only one of the seven to survive into modern times. The Ancient Egyptians covered their faces with polished white limestone, though most of the stones used for the purpose have fallen or have been removed and used to build the mosques of Cairo.

Nubia

Nubian pyramids were constructed (roughly 220 of them) at three sites in Nubia to serve as tombs for the kings and queens of Napata and Meroë. The pyramids of Kush, also known as Nubian Pyramids, do not resemble the pyramids of Egypt. The Nubian pyramids were constructed at a steeper angle than Egyptian ones and were monuments to dead kings and queens.[5]

Pyramids were still being built in Nubia up to AD 300.

Greece

Dotted throughout the landscape are remains of buildings that were described by ancient travelers as pyramids. They were first excavated by Americans and Germans in the early 1900s and the 1960s.

Pausanias, a Greek traveler in the second century AD described several of the structures as pyramids. One of these pyramids was located in Hellenikon (Ελληνικό in Greek), a village near Argos near the ancient ruins of Tiryns.[6] The story surrounding the monument was that it was built as a polyandria, a common grave, for those soldiers who had fallen in the struggle for the throne of Argos back in the 14th Century BC He described the structure as something that resembled a pyramid with the decorations of Argolic shields, showing the military connection to it. Another pyramid that Pausanias saw on his journeys was at Kenchreai, another polyandria dedicated to the Argives and Spartans who lost their lives at the Battle of Hysiai in 669 BC. Unfortunately neither of these structures remain fully intact today to test how closely they resembled the pyramids of Egypt nor is there any proof that they even resembled an Egyptian pyramid at all.

There are two surviving pyramid-like structures still available to study, one at Hellenikon and the other at Ligourion, a village near the ancient theatre Epidaurus. With these two pyramid’s base stones remaining, it is possible to determine that Grecian pyramids existed. These buildings were not constructed in the same manner as the pyramids in Egypt. The buildings at Hellenikon and Ligourion were no more than 70 meters tall and were surrounded by walls, with the base of the Helleniko pyramid being nine meters by 7 meters. The stone used to build the pyramids was limestone quarried locally and was cut to fit, not into freestanding blocks like the Great Pyramid of Giza. The base of the structures also differed from the Egyptian pyramids as they were rectangular, not square. This simple construction shape made it very difficult to make the top of the building come together in a point. As such, it makes more sense that these structures could have been peaked by a roof or platform.

There are no remains or graves in or near the structures. Instead, the rooms that the walls housed were made to be locked from the inside. This coupled with the platform roof, means that one of the functions these structures could have served was as watchtowers. Another possibility for the buildings is that they are shrines to heroes and soldiers of ancient times, but the lock on the inside makes no sense for such a purpose.

The dating of these ‘pyramids’ has been made from the pot shards excavated from the floor and on the grounds. The latest dates available from scientific dating have been estimated around the 5th and 4th centuries. There are many researchers who have given dates to the structures that pre-date the pyramids at Giza, but the method to obtain these dates was thermoluminescence of the stone.[citation needed] Normally this technique is used for dating pottery, but here researchers have used it to try to date stone flakes from the walls of the structures. This has created some debate about whether or not these ‘pyramids’ are actually older than Egypt, which is part of the Black Athena controversy.[citation needed] The basis for their use of thermoluminescence in order to date these structures is a new method of collecting samples for testing. Scientists from laboratories hired out by the recent excavators of the site, The Academy of Athens, say that they can use the electrons trapped on the inner surface of the stones to positively identify the date that the stones were quarried and put together.

The issue with this method is that they date the pyramids with a margin of error of up to over 700 years. This method dated the Helleniko pyramid to 2730 BC with an error factor of plus or minus 720 years. It also dated the Ligourio pyramid to 2260 BC with an error of plus or minus 714 years. Though these initial dates are indicative of these structures being built before the pyramid complex at Giza, it also means that they could have been built well after Khufu’s Great Pyramid was erected. Some archaeologists, however, have indicated that these samples may have been very select in their choice of which stones to sample. Further excavations of the site at Helleniko reveal that it was constructed on a previously existing structure, giving a possibility that the new methods of dating may be a misinterpretation.

Along with these five structures there are 14 more pyramid-like buildings, or their remains, scattered throughout the rest of the country side of Greece. These sites do not get as much attention as the two at Helleniko and Ligourio as they are the only ones mentioned in surviving accounts of ancient travelers.

China

There are many square flat-topped mound tombs in China. The First Emperor of China (circa 221 BC, who unified the 7 pre-Imperial Kingdoms), also the First Emperor Qin, was buried under a large mound outside modern day Xi'an. In the following centuries about a dozen more Han Dynasty royals were also buried under flat-topped pyramidal earthworks.

Mesoamerica

Pyramid in the Mayan city of Chichen-Itza, Mexico

A number of Mesoamerican cultures also built pyramid-shaped structures. Mesoamerican pyramids were usually stepped, with temples on top, more similar to the Mesopotamian ziggurat than the Egyptian pyramid.

The largest pyramid by volume is the Great Pyramid of Cholula, in the Mexican state of Puebla. This pyramid is considered the largest monument ever constructed anywhere in the world, and is still being excavated. The third largest pyramid in the world, the Pyramid of the Sun, is also located in Mexico. There is an unusual pyramid with a circular plan at the site of Cuicuilco, now inside Mexico City and mostly covered with lava from an ancient eruption of Xictli. Pyramids in Mexico were often used as places of human sacrifice.

North America

Many mound-building societies of ancient North America built large pyramidal earth structures known as platform mounds. Among the largest and best-known of these structures is Monk's Mound at the site of Cahokia, which has a base larger than that of the Great Pyramid at Giza. While the North American mounds' precise function is not known, they are believed to have played a central role in the mound-building people's religious life.

Roman Empire

The 27-metre-high Pyramid of Cestius was built by the end of the first century BC and still exists today, close to the Porta San Paolo. Another one, named Meta Romuli, standing in the Ager Vaticanus (today's Borgo), was destroyed at the end of the 15th century.

There is also a Roman era pyramid built in Falicon, France.[7] There were many more pyramids built in France in this period.

Medieval Europe

Pyramids have occasionally been used in Christian architecture of the feudal era, e.g. as the tower of Oviedo's Gothic Cathedral of San Salvador. In some cases this leads to speculations on masonic or other symbolical intentions.

India

Detail of the main gopura (tower) of the Thanjavur Temple pyramid in Thanjavur, Tamil Nadu

Many giant granite temple pyramids were made in South India during the Chola Empire, many of which are still in religious use today. Examples of such pyramid temples include Brihadisvara Temple at Thanjavur, the Temple of Gangaikondacholapuram and the Airavatesvara Temple at Darasuram. However the largest temple pyramid in the area is Sri Rangam in Srirangam, Tamil Nadu. The Brihadisvara Temple was declared by UNESCO as a World Heritage Site in 1987; the Temple of Gangaikondacholapuram and the Airavatesvara Temple at Darasuram were added as extensions to the site in 2004.[8]

Modern pyramids

Examples of modern pyramids are:

Gallery

See also

Notes

References

  • Patricia Blackwell Gary and Richard Talcott, "Stargazing in Ancient Egypt," Astronomy, June 2006, pp. 62–67.
  • Fagan, Garrett. "Archaeological Fantasies." RoutledgeFalmer. 2006

Translations: Pyramid
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Dansk (Danish)
n. - pyramide
v. tr. - danne en pyramide
v. intr. - danne en pyramide

Nederlands (Dutch)
piramide, opstapelen, opbouwen

Français (French)
n. - pyramide, en forme de pyramide, (Fin) spéculations (sur des bénéfices fictifs en Bourse)
v. tr. - (Fin) spéculer en faisant un réinvestissement de bénéfices fictifs, construire en pyramide, (fig) théoriser peu à peu (à partir de généralités)
v. intr. - former une pyramide, s'étendre vite (en largeur), (Fin) spéculer en faisant un réinvestissement de bénéfices fictifs

Deutsch (German)
n. - Pyramide
v. - pyramidenförmig anordnen

Ελληνική (Greek)
n. - πυραμίδα
v. - διατάσσω σαν πυραμίδα

Italiano (Italian)
piramide

Português (Portuguese)
n. - pirâmide (f)
v. - piramidar, amontoar

Русский (Russian)
пирамида

Español (Spanish)
n. - pirámide
v. tr. - aumentar en forma piramidal, acomodar o disponer objetos en forma piramidal
v. intr. - aumentar gradualmente

Svenska (Swedish)
n. - pyramid

中文(简体)(Chinese (Simplified))
角锥, 金字塔, 使成尖塔形, 使节节增加, 使步步升高, 成尖塔形, 节节增加, 步步升高

中文(繁體)(Chinese (Traditional))
n. - 角錐, 金字塔
v. tr. - 使成尖塔形, 使節節增加, 使步步升高
v. intr. - 成尖塔形, 節節增加, 步步升高

한국어 (Korean)
n. - 피라미드, 금자탑
v. tr. - 피라미드 모양으로 하다
v. intr. - 점차로 증가되다

日本語 (Japanese)
n. - ピラミッド, ピラミッド形の物, 角すい, 金字塔, 角錐, 錐

العربيه (Arabic)
‏(الاسم) هرم‏

עברית (Hebrew)
n. - ‮פירמידה, חדודית, עלה, מין משחק ביליארד‬
v. tr. - ‮בנה או סידר כפירמידה, הגדיל בהדרגה‬
v. intr. - ‮הסתדר בצורת פירמידה‬


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