
1) Gothic architecture
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https://www.crosswordclues.com/clue/flying-buttress

a specific type of buttress usually found on a religious building such as a cathedral.
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http://en.wikipedia.org/wiki/Glossary_of_architecture

A masonry support branching from the sturdy piers and vertical Standing buttresses. Their role is to transfer the great weight of the vaulted roofs off to this more solid support of the firmly set abutments. In French
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http://www.artisansofthevalley.com/comm_gloss3.html

(from the article `Gothic art`) ...outward thrust of the ribbed ceiling vaults was carried across the outside walls of the nave, first to an attached outer buttress and then to a ... At the technical level Gothic architecture is characterized by the ribbed vault (a vault in which stone ribs carry the vaulted surface), the pointed ... ...
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http://www.britannica.com/eb/a-z/f/41

In Gothic architecture, a stone buttress in the form of an arched prop, supported at one end by the main wall of a building and at the other end by a pier, in order to resist a lateral thrust. A...
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http://www.encyclo.co.uk/local/20688

A buttress which stands away from its building, and is attached to it by a ‘bridge`.
Found on
http://www.encyclo.co.uk/local/20941

See buttress.
Found on
http://www.encyclo.co.uk/local/21532

An iconic feature of Gothic masonry. An arched brace that transmits the lateral forces from a roof or vaulted ceiling to a masonry buttress;
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http://www.encyclo.co.uk/local/22188

A buttress which stands away from its building, and is attached to it by a ‘bridge’.
Found on
http://www.encyclo.co.uk/local/22200

A free-standing buttress attached to the main vessel (nave, choir, or transept wall) by an arch or half-arch which transmits the thrust of the vault to the buttress attached to the outer wall of the aisle.
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http://www.pitt.edu/~medart/menuglossary/INDEX.HTM

In architecture a flying buttress (also known as an arch-buttress) is a contrivance for taking up the thrust of a roof or vault which can not be supported by ordinary buttresses. It consists of a straight bar of masonry, usually sloping, carried on an arch, and a solid pier or buttress sufficient to receive the thrust. The word is generally applied...
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http://www.probertencyclopaedia.com/browse/TF.HTM

A buttress that includes a rampant arch to carry the inner thrust to the pier.
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http://www.selectstone.com/architectural-resources/stone-glossary/

An arched supporting pier outside a building which takes most of the weight of the roof, allowing the walls to be devoted to window-space rather than being used to support the roof.
Found on
http://www.translationdirectory.com/glossaries/glossary336.php

[
n] - a buttress that stands apart from the main structure and connected to it by an arch
Found on
http://www.webdictionary.co.uk/definition.php?query=flying%20buttress
arc-boutant noun a buttress that stands apart from the main structure and connected to it by an arch
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https://www.encyclo.co.uk/local/20974

a segmental arch transmitting an outward and downward thrust to a solid buttress that through its inertia transforms the thrust into a vertical one. See illus. under
Found on
https://www.infoplease.com/dictionary/flying-buttress
No exact match found.