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water glass

noun

Simple Definition of water glass

  • : a drinking glass

Full Definition of water glass

  1. 1 :  a glass vessel (as a drinking glass) for holding water

  2. 2 :  an instrument consisting of an open box or tube with a glass bottom used for examining objects in or under water

  3. 3 :  a substance that consists usually of the silicate of sodium, is found in commerce as a glassy mass, a stony powder, or dissolved in water as a viscous syrupy liquid, and is used especially as a cement, a protective coating, and as a fireproofing agent


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