The Collaborative International Dictionary of English v.0.48:
Sprayer \Spray"er\ (spr[=a]"[~e]r), n. One that sprays; any instrument for vaporizing and spraying liquids. [Webster 1913 Suppl.]WordNet (r) 3.0 (2006):
sprayer n 1: a worker who applies spray to a surface 2: a dispenser that turns a liquid (such as perfume) into a fine mist [syn: atomizer, atomiser, spray, sprayer, nebulizer, nebuliser]