diffuser

C1 · Advanced Countable noun FORMULA 1 Technical

n. A shaped section on the bottom of a car, especially a racing car, that helps it stay on the road by controlling airflow.

n. An aerodynamic rear floor section designed to increase the transition between high-velocity airflow under the car and the slower ambient air, generating downforce.

“The race car has a large diffuser at the back to help it go faster around corners.”

“Engineers modified the rear diffuser to improve the car's stability by creating a low-pressure zone beneath the chassis.”

B2 · Upper Intermediate Countable noun Science Technical

n. An attachment for a lamp or camera flash that makes the light softer and spreads it out evenly.

n. A translucent screen or attachment placed over a light source to scatter light rays, reducing harsh shadows and high contrast.

“The photographer used a plastic diffuser on his flash to avoid harsh shadows on the model's face.”

“By placing a large silk diffuser in front of the studio lights, the cinematographer achieved a soft, naturalistic glow.”

B1 · Intermediate Countable noun

n. A plastic attachment for a hair dryer that spreads the air out so it does not ruin curls.

n. A blow-dryer attachment designed to distribute airflow over a larger area, preventing frizz and maintaining the natural shape of curly hair.

“If you have curly hair, you should use a diffuser when you dry it.”

“The stylist recommended a wide-bowl diffuser to enhance the volume of the client's natural curls without causing heat damage.”