Noun water glass has 4 senses
  1. soluble glass, water glass, sodium silicate - a viscous glass consisting of sodium silicate in solution; used as a cement or as a protective coating and to preserve eggs
    --1 is a kind of glass
  2. water glass - a glass for drinking water
    --2 is a kind of
    glass, drinking glass
  3. water gauge, water gage, water glass - gauge for indicating the level of water in e.g. a tank or boiler or reservoir
    --3 is a kind of gauge, gage
    --3 has particulars: water level
  4. water clock, clepsydra, water glass - clock that measures time by the escape of water
    --4 is a kind of clock
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