[pol-ee-kahr-buh-neyt, -nit]
noun Chemistry.
a synthetic thermoplastic resin, a linear polymer of carbonic acid, used for molded products, films, and nonbreakable windows.
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poly- + carbonate

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World English Dictionary
polycarbonate (ˌpɒlɪˈkɑːbəˌneɪt, -nɪt)
any of a class of strong transparent thermoplastic resins used in moulding materials, laminates, etc

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Example sentences
Pee into a polycarbonate bottle and wash it out when its full.
The polycarbonate lenses-available in three shades of gray-render a true yet
  glare-free picture of the world.
It is made from a polycarbonate alloy, a type of plastic that resists
  penetration better than the polyethylene normally used.
Plastic and polycarbonate lenses require a scratch-resistant coating to prolong
  their useful life.
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