atomizer

n. something which atomizes, device which transforms a liquid to into tiny particles; perfume sprayer (also atomiser)

Atomization (British English: atomisation) is conversion of bulk liquid into a spray or mist (i.e. collection of drops), often by passing the liquid through a nozzle. Despite the name, it does not usually imply that the particles are reduced to atomic sizes, although that is the case with plasma arc waste disposal.
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Atomizer /at·om·iz·er/ nebulizer. at·om·iz·er n. A device used to reduce liquid medication to a fine spray or aerosol. [more]Atomizer - Community and Resources

Noun
1. a dispenser that turns a liquid (such as perfume) into a fine spray
(synonym) atomiser, spray, sprayer
(hypernym) dispenser
(hyponym) airbrush
(derivation) atomize, atomise

n. atomizer, sprayer