Look up: Zircon

1. zircon
   [n] - a common mineral occurring in small crystals
   Found on http://www.webdictionary.co.uk/definitio
   
   
2. Zircon
   Codename for a British signals-intelligence satellite originally intended to be launched in 1988. The revelation of the existence of the Zircon project (which had been concealed by the...
   Found on http://www.encyclo.co.uk/local/20688
   
   
3. zircon
   zircon orthosilicate; this term is also applied by extension to a rock containing a major proportion of this mineral Category: Various industries and crafts
   Found on http://www.mijnwoordenboek.nl/definition
   
   
4. Zircon
   Gemstone which ranges in colour through yellow, red and orange to green. Colourless, golden-brown and sky-blue versions are produced by heat treatment. Most of the mineral suitable for gemstones comes from the Far East and Sri Lanka. Yellow and brown shades of zircon were often termed hyacinth, and transparent or colourless types are sometimes know …
   Found on http://www.encyclo.co.uk/visitor-contrib
   
   
5. Zircon
   Zir'con noun [ French, the same word as jargon . See Jargon a variety of zircon.] (Min.) A mineral occurring in tetragonal crystals, usually of a brown or gray color. It consists of silica and zirconia. A red variety, used as a gem, i...
   Found on http://www.encyclo.co.uk/webster/Z/4
   
   
6. zircon
   <chemical> A mineral occurring in tetragonal crystals, usually of a brown or gray colour. It consists of silica and zirconia. A red variety, used as a gem, is called hyacinth. Colourless, pale-yellow or smoky-brown varieties from Ceylon are called jargon. Zircon syenite, a coarse-grained syeni...
   Found on http://www.mondofacto.com/facts/dictiona
   
   
7. zircon
   zirconium silicate noun a common mineral occurring in small crystals; chief source of zirconium; used as a refractory when opaque and as a gem when transparent
   Found on http://wordnetweb.princeton.edu/perl/web
   
   
8. Zircon
   • (n.) A mineral occurring in tetragonal crystals, usually of a brown or gray color. It consists of silica and zirconia. A red variety, used as a gem, is called hyacinth. Colorless, pale-yellow or smoky-brown varieties from Ceylon are called jargon.
   Found on http://thinkexist.com/dictionary/meaning
   
   
9. zircon
   silicate mineral, zirconium silicate, ZrSiO4, the principal source of zirconium. Zircon is widespread as an accessory mineral in felsic igneous ... [9 related articles]
   Found on http://www.britannica.com/eb/a-z/z/9
   
   
10. Zircon
    Zircon was a codename for a British spy satellite originally intended to be launched 1988. The revelation of the existence of the Zircon project (which had been concealed by the government) by the journalist Duncan Campbell, and the government's subsequent efforts to suppress a programme about it on...
    Found on http://www.probertencyclopaedia.com/brow
    
    
11. Zircon
    Zircon (zirconium silicate) has the formulae ZrSiO4 and a relative hardness of 8. It is a common accessory mineral found in all types of igneous rocks. When transparent it's used as a gemstone.
    Found on http://www.probertencyclopaedia.com/brow
    
    
12. Zircon
    Codename for a British signals-intelligence satellite originally intended to be launched in 1988. The revelation of the existence of the Zircon project (which had been concealed by the government), and the government's subsequent efforts to suppress a programme about it on BBC television, caused much controversy in 1987. Its intended functi...
    Found on http://www.talktalk.co.uk/reference/ency
    
    
13. zircon
    Zirconium silicate, ZrSiO₄, a mineral that occurs in small quantities in a wide range of igneous, sedimentary, and metamorphic rocks. It is very durable and is resistant to erosion and weathering. It is usually coloured brown, but can be other colours, and when transparent may be used as a gemstone. Zircons contain abundant r...
    Found on http://www.talktalk.co.uk/reference/ency
    
    
14. Zircon
    (satellite) `Zircon` was the codename for a British signals intelligence satellite, intended to be launched in 1988, before being cancelled. During the Cold War, Britain`s GCHQ was heavily reliant on America`s National Security Agency (NSA) for communications interception from space. Concern ...
    Found on http://en.wikipedia.org/wiki/Zircon