The phrase "black diffuser" refers to a device or component, usually black in color, that helps spread or disperse light evenly. It is commonly used in photography, automotive design, or electronics to minimize harsh light or glare. Full definition
Around back, the sedan received tinted taillights, a gloss - black diffuser insert with a carbon - fiber surround, and gloss - black exhaust pipes. (topspeed.com)
The rear image of this car is dominated by a large roof edge spoiler and a prominent glossy black diffuser in the lower bumper area that shows typical R - styling. (ausmotive.com)
A new black diffuser matches this powerful and precise design, making the bumper appear to sit lower and the car as a whole flatter in its proportions. (topspeed.com)