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diffuse +‎ -er


diffuser ‎(plural diffusers)

  1. Any person or thing that diffuses.
  2. A device designed to diffuse a scent efficiently.
    • 2009 February 28, Rita Zekas, “DecoRita visits West Elm”, in Toronto Star[1]:
      They are in the under-$20 section, which includes a display of scented candles and diffusers.
  3. (optics) Any device that or spreads out or scatters light, making the light appear softer.
    • 2008 January 24, “In a Town Known for Light, a House With Very Little”, in New York Times[2]:
      Along the sofa every three and a half feet, fluorescent tubes glow through translucent plastic diffusers.
  4. (automotive) A shaped section of a car's underbody which improves the car's aerodynamic properties.
  5. (thermodynamics) A mechanical device that is designed to control the characteristics of a fluid at the entrance to a thermodynamic open system.
  6. (sewage treatment) An aerating device consisting of a membrane with fine pores, through which air is blown to generate small bubbles.
  7. (cooking) A cooking item that can be placed above a stove heating element or burner to separate the cooking utensil from the heat source.
  8. A hairdryer attachment that diffuses the flow of air.

See also[edit]




  1. to diffuse
  2. to broadcast


External links[edit]




  1. comparative degree of diffus