Atomization
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Atomization is the reduction of infinitesimal particles (such as of a fluid) to a fine spray or mist, often by passing the particles through a nozzle.
An atomizer is an atomization apparatus; carburetors, airbrushes, misters, and spray bottles are only a few examples of atomizers used ubiquitously. In internal combusion engines, fine-grained fuel atomization is instrumental to efficient combustion.
In some manufacturing process, one may produce a fine powder by spraying molten or dissolved materials through an atomizer and solidifying the droplets.