flying buttress

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flying buttress:

see buttressbuttress,
mass of masonry built against a wall to strengthen it. It is especially necessary when a vault or an arch places a heavy load or thrust on one part of a wall. In the case of a wall carrying the uniform load of a floor or roof, it is more economical to buttress it at
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flying buttress

A characteristic feature of Gothic construction in which the lateral thrusts of a roof or vault are carried by a segmental masonry arch, usually sloping, to a solid pier or support that is sufficiently massive to receive the thrust.
See also: Buttress
Illustrated Dictionary of Architecture Copyright © 2012, 2002, 1998 by The McGraw-Hill Companies, Inc. All rights reserved

flying buttress

[¦flī·iŋ ′bə·trəs]
(architecture)
A buttress connected by an arch to the building it supports.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

flying buttress

flying buttress: A
A characteristic feature of Gothic construction, in which the lateral thrusts of a roof or vault are taken up by a straight bar of masonry, usually sloping, carried on an arch, and a solid pier or buttress sufficient to receive the thrust.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.

flying buttress

a buttress supporting a wall or other structure by an arch or part of an arch that transmits the thrust outwards and downwards
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005