Look up: Keystone

1. 
   Keystone
   Central wedge in top of arch.
   Found on http://www.castlesontheweb.com/glossary.
   
   
2. 
   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
   
   
3. 
   Keystone
   Keystone is a city in Benton County Iowa, USA Keystone is a city in McDowell County West Virginia, USA Keystone is a town in Bayfield County Wisconsin, USA Keystone is a town in Pennington County South Dakota, USA Keystone is a township in Dickey County North Dakota, USA Keystone is a township in Polk County Minnesota, USA Keystone is a township in Scott County Kansas, USA
   Found on http://www.encyclo.co.uk/nol.php
   
   
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.lancashirechurches.co.uk/glos
   
   
6. 
   keystone
   The central stone in the Roman arch
   Found on http://myweb.tiscali.co.uk/temetfutue/gl
   
   
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/gloss
   
   
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.makingthemodernworld.org.uk/l
   
   
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.trp.dundee.ac.uk/research/glo
    
    
12. 
    Keystone
    The central stone in an arch or vault.
    Found on http://www.crsbi.ac.uk/crsbi/frglossary.
    
    
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 , the State of Pennsylvania; - - so called from its having been the central State of the Union at the formation of the Constitution.
    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://wordnet.princeton.edu/perl/webwn?
    
    
17. 
    Keystone
    `Keystone` may refer to: * Keystone (architecture), the piece at the apex of an arch or vault * Keystone (cask), a wooden or plastic fitting used in ale casks. * Keystone (software), A parser and front-end for ISO C++ * Keystone species, species that have a larger effect on their environment than is purely due to their abundance * A poetic-theological description of The Book of Mormon * Keystone module, a type of data connector mounted in walls ...
    Found on http://en.wikipedia.org/wiki/Keystone
    
    
18. 
    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
    
    
19. 
    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
    
    
20. 
    keystone
    central wedge shaped stone at the top of an arch
    Found on http://www.castles-of-britain.com/castle
    
    
21. 
    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.hometheatermag.com/glossary/