Look up: keystone

1. Keystone
   In architecture a keystone is the central or topmost stone of an arch. This in some styles is made different in size from the other voussoirs, or projects, or is decorated with carving.
   Found on http://www.probertencyclopaedia.com/brow
   
   
2. Keystone
   Central wedge in top of arch.
   Found on http://www.encyclo.co.uk/local/20018
   
   
3. keystone
   The voussoir at the top of an arch; in vaulting it occurs at the intersection of the ribs of a rib vault. It is important structurally since it marks the apex of the vault.
   Found on http://www.pitt.edu/~medart/menuglossary
   
   
4. keystone
   [n] - the central building block at the top of an arch or vault
   Found on http://www.webdictionary.co.uk/definitio
   
   
5. keystone
   the central, locking stone in an arch made of voussoirs (q.v.)
   Found on http://www.encyclo.co.uk/local/20559
   
   
6. keystone
   The central stone in the Roman arch
   Found on http://www.encyclo.co.uk/visitor-contrib
   
   
7. Keystone
   The Keystone is the central wedge-shaped stone at the top of a curved arch that holds the arch in place. The keystone is also known as the central voussoir.
   Found on http://www.designbuild-network.com/contr
   
   
8. Keystone
   Final, or first stone, that is used to lock together a section of stonework, or provide a firm base stone e.g. in pitching or revetments.
   Found on http://www.snh.org.uk/publications/on-li
   
   
9. keystone
   (Learning Modules / Mathematics / Bridges) The 'keystone' is the central stone in an arch, and begins the distribution of the vertical 'load' forces down and around the arch. The keystone is the last voussoir to be placed in position, and allows each half of the arch to support the other.
   Found on http://www.encyclo.co.uk/visitor-contrib
   
   
10. Keystone
    The highest and last-placed stones in an arch. In the arch barrel of a bridge there are a series of keystones at the crown, across its width, which are often left projecting on side elevations.
    Found on http://www.smart.salford.ac.uk/technical
    
    
11. Keystone
    the voussoir at the centre of the arch, often larger and decorated. (Illustration)
    Found on http://www.encyclo.co.uk/local/20935
    
    
12. Keystone
    The central stone in an arch or vault.
    Found on http://www.crsbi.ac.uk/resources/glossar
    
    
13. Keystone
    The topmost of the stones forming a round-headed arch, sometimes made to project from the plane of the arch. In Georgian architecture an ornamental keystone is often applied to the centre of a lintol. Related Words: Arch; Georgian; Lintol, lintel
    Found on http://www.maintainyourchurch.org.uk/Too
    
    
14. Keystone
    This is the highest block of stone (voussoir) in an arch. In vaulting it occurs at the intersection of the ribs of a rib vault. A keystone cannot fall out of place because it is wedge-shaped, with the widest part of the wedge at the top. By pressing equally on either side it holds the arch together. Also see: voussoir, rib vault, boss.
    Found on http://www.virtualani.org/glossary/index
    
    
15. Keystone
    Key'stone` noun (Architecture) The central or topmost stone of an arch. This in some styles is made different in size from the other voussoirs, or projects, or is decorated with carving. See Illust. of Arch . Keystone State ,...
    Found on http://www.encyclo.co.uk/webster/K/7
    
    
16. keystone
    key 3 headstone noun the central building block at the top of an arch or vault
    Found on http://wordnetweb.princeton.edu/perl/web
    
    
17. Keystone
    • (n.) The central or topmost stone of an arch. This in some styles is made different in size from the other voussoirs, or projects, or is decorated with carving. See Illust. of Arch.
    Found on http://thinkexist.com/dictionary/meaning
    
    
18. keystone
    (from the article `arch`) ...blocks are called voussoirs. Each voussoir must be precisely cut so that it presses firmly against the surface of neighbouring blocks and conducts ...
    Found on http://www.britannica.com/eb/a-z/k/25
    
    
19. keystone
    central wedge shaped stone at the top of an arch
    Found on http://www.castles-of-britain.com/glossa
    
    
20. Keystone
    A form of video image distortion in which the top of the picture is wider than the bottom, or the left is taller than the right, or vice versa. The image is shaped like a trapezoid rather than a rectangle.
    Found on http://www.encyclo.co.uk/local/21058
    
    
21. Keystone
    Founded in 1912 when financing was received by Mack Sennett, Keystone Company began producing films in 1913. Five hundred films were made under the leadership of Sennett and included such stars as Charlie Chaplin, Chester Conklin, Fatty Arbuckle, and Buster Keaton. Though it did not survive the depa...
    Found on http://www.allmovie.com/glossary/term/ke
    
    
22. Keystone
    (architecture) A `keystone` is the wedge-shaped stone piece at the apex of a masonry vault or publisher= University of Pittsburgh |accessdate= 2007-06-25 -->--><ref name="merriam">--> Although a masonry arch or vault cannot be self-supporting until the keystone is placed, the key...
    Found on http://en.wikipedia.org/wiki/Keystone
    
    
23. Keystone
    (train) The `Keystone` was a set of eight cars, built by the Budd Company in 1956 for the Pennsylvania Railroad. It consisted of seven coaches seating a total of 574 passengers, and one Head end power (HEP) generator car. The train was normally used in New York, NY, to Washington, D.C....
    Found on http://en.wikipedia.org/wiki/Keystone
    
    
24. Keystone
    (cask) A `keystone` is a small wooden or plastic fitting used in ale casks. For some years wooden casks have been effectively obsolete, with the majority now being aluminium or stainless steel, and a few sturdy plastic ones beginning to appear. Nevertheless, the standard tap is still designed...
    Found on http://en.wikipedia.org/wiki/Keystone
    
    
25. Keystone
    (beer brand) `Keystone` beer is a product of the Coors Brewing Company in Golden, Colorado. It was first introduced in Chico, California in September 1989. Keystone can be found in can, keg, and occasionally bottled form. Keystone Light has a 4.13% ABV; a concentration less than standard Amer...
    Found on http://en.wikipedia.org/wiki/Keystone