aerosol

Short definition from Wiktionary

Noun

1. 1
   A mixture of fine solid particles or liquid droplets suspended in a gaseous medium.
2. 2
   An aerosol can.
3. 3
   The payload (e.g. insecticide, paint, oil, cosmetics) and propellant contained by an aerosol can.
4. 4
   A colloidal system in which the dispersed phase is composed of either solid or liquid particles and in which the dispersal medium is some gas, usually air.

Verb

1. 1
   To spray with an aerosol.