diffuser.

Any person or thing that diffuses.

A device designed to diffuse a scent efficiently.

Any device that or spreads out or scatters light, making the light appear softer.

A shaped section of a car's underbody which improves the car's aerodynamic properties.

A mechanical device that is designed to control the characteristics of a fluid at the entrance to a thermodynamic open system.

An aerating device consisting of a membrane with fine pores, through which air is blown to generate small bubbles.

A cooking item that can be placed above a stove heating element or burner to separate the cooking utensil from the heat source.

A hairdryer attachment that diffuses the flow of air.