'Diffuser' definitions:

Definition of 'diffuser'

From: WordNet
noun
Baffle that distributes sound waves evenly [syn: diffuser, diffusor]
noun
Optical device that distributes the light of a lamp evenly [syn: diffuser, diffusor]

Definition of 'Diffuser'

From: GCIDE
  • Diffuser \Dif*fus"er\, n. One who, or that which, diffuses. [1913 Webster]