diffuser

noun dif·fus·er \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

circa 1679

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