diffusers

noun

1. 1.Any person or thing that diffuses.
2. 2.A device designed to diffuse a scent efficiently.
3. 3.Any device that or spreads out or scatters light, making the light appear softer.
4. 4.A shaped section of a car's underbody which improves the car's aerodynamic properties.
5. 5.A mechanical device that is designed to control the characteristics of a fluid at the entrance to a thermodynamic open system.