noun \di-ˈfyü-zər\

Definition of DIFFUSER

:  one that diffuses: as
a :  a device (as a reflector) for distributing the light of a lamp evenly
b :  a screen (as of cloth or frosted glass) for softening lighting (as in photography)
c :  a device (as slats at different angles) for deflecting air from an outlet in various directions
:  a device for reducing the velocity and increasing the static pressure of a fluid passing through a system

First Known Use of DIFFUSER

circa 1679


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