spray gun(n = noun.artifact) - an applicator resembling a gun for applying liquid substances (as paint) in the form of a spray;
is a kind of applicator, applier

   a container for liquid, fitted with a conduit that can be supplied with compressed air, desiged to allowing the contents to be sprayed as an aerosol. Such devices are used to spray paints and various other liquids. [PJC]

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