• noun
• synonym
• antonym

• mercury-vapour lamp (noun)
  1. rich in ultraviolet radiation ultraviolet lamp that emits a strong bluish light as electric current passes through mercury vapour
• sodium-vapour lamp (noun)
  1. lamp in which an electric current passed through a tube of sodium vapour makes a yellow light; used is street lighting
• vapour bath (noun)
  1. a room that can be filled with steam in which people bathe
  2. you sweat in a steam room before getting a rubdown and cold shower
• vapour density (noun)
  1. the density of a gas relative to the density of hydrogen
• vapour lock (noun)
  1. especially a stoppage that develops in hot weather in an internal-combustion engine when fuel in the gas line boils and forms bubbles that block the flow of petrol to the carburettor a stoppage in a pipeline caused by gas bubbles
• vapour pressure (noun)
  1. the vapour pressure of a vapour in contact with its liquid form the pressure exerted by a vapour; often understood to mean saturated vapour pressure
• vapour trail (noun)
  1. the white line that is left in the sky by a plane
• water vapour (noun)
  1. water in the form of small drops in the air
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