- a person or thing that diffuses.
- (in various machines or mechanical systems, as centrifugal pumps or compressors) a device for utilizing part of the kinetic energy of a fluid passing through a machine by gradually increasing the cross-sectional area of the channel or chamber through which it flows so as to decrease its speed and increase its pressure.
- (in a lighting fixture) any of a variety of translucent materials for filtering glare from the light source.
- a pierced plate or similar device for distributing compressed air for aeration of sewage.
Origin of diffuser
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for diffuser
Never fear that you can be too prolix: the diffuser you are, the easier I shall forgive myself.The Disowned, Complete
It seems probable that he was a diffuser of knowledge rather than an originator, but as a great teacher his fame is secure.A History of Science, Volume 1(of 5)
Henry Smith Williams
The old idea of a librarian was that of a guardian or keeper of books—not a diffuser of knowledge, but a mere custodian of it.A Book for All Readers
Ainsworth Rand Spofford
Here is an example of Spenser's diffuser style, taken from the second book of the Faerie Queene.Milton
Sir Walter Alexander Raleigh
The most conspicuous addition made by Mr. Boyden was the diffuser.
- a person or thing that diffuses
- a part of a lighting fixture consisting of a translucent or frosted covering or of a rough reflector: used to scatter the light and prevent glare
- a cone, wedge, or baffle placed in front of the diaphragm of a loudspeaker to diffuse the sound waves
- a duct, esp in a wind tunnel or jet engine, that widens gradually in the direction of flow to reduce the speed and increase the pressure of the air or fluid
- photog a light-scattering medium, such as a screen of fine fabric, placed in the path of a source of light to reduce the sharpness of shadows and thus soften the lighting
- a perforated plate or similar device for distributing compressed air in the aeration of sewage
- a device, attached to a hairdryer, which diffuses the warm air as it comes out
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012