"diffuser" in the noun sense
1. diffuser, diffusor
baffle that distributes sound waves evenly
2. diffuser, diffusor
optical device that distributes the light of a lamp evenly
"diffuser" in the adjective sense
1. diffuse
spread out not concentrated in one place
"a large diffuse organization"
2. soft, diffuse, diffused
of light) transmitted from a broad light source or reflected
3. diffuse
lacking conciseness
"a diffuse historical novel"
Source: WordNet® (An amazing lexical database of English)
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