- an atomizer, esp. one for creating steam or vaporizing medicated liquid for medicinal purposes
- a jet in a carburetor
- A device with a heating element, used to vaporize a liquid.
- Vaporizers are used in electronic cigarettes to simulate smoke.
- (medicine) A device with a heating element, used to vaporize a liquid solution with medicine. The produced vapor condensates into fine aerosols, forming a mist inside the device, to be inhaled by the patient for delivery of the medicine into the lungs.