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1. One that diffuses, as:
a. A light fixture, such as a frosted globe, that spreads light evenly.
b. A medium that scatters light, used in photography to soften shadows.
c. A device, such as a cone or baffle, placed in front of a loudspeaker diaphragm to diffuse the sound waves.
2. A flow passage in a wind tunnel that decelerates a stream of gas or liquid from a high to a low velocity.


(dɪˈfjuːzə) or


1. a person or thing that diffuses
2. (Furniture) a part of a lighting fixture consisting of a translucent or frosted covering or of a rough reflector: used to scatter the light and prevent glare
3. (Electronics) a cone, wedge, or baffle placed in front of the diaphragm of a loudspeaker to diffuse the sound waves
4. (Aeronautics) a duct, esp in a wind tunnel or jet engine, that widens gradually in the direction of flow to reduce the speed and increase the pressure of the air or fluid
5. (Photography) photog a light-scattering medium, such as a screen of fine fabric, placed in the path of a source of light to reduce the sharpness of shadows and thus soften the lighting
6. (Civil Engineering) a perforated plate or similar device for distributing compressed air in the aeration of sewage
7. (Hairdressing & Grooming) a device, attached to a hairdryer, which diffuses the warm air as it comes out


(dɪˈfyu zər)

1. a person or thing that diffuses.
2. (in a lighting fixture) any of a variety of translucent materials for filtering glare from the light source.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.diffuser - baffle that distributes sound waves evenly
baffle, baffle board - a flat plate that controls or directs the flow of fluid or energy
2.diffuser - optical device that distributes the light of a lamp evenly
lamp - a piece of furniture holding one or more electric light bulbs
lighting fixture - a fixture providing artificial light
optical device - a device for producing or controlling light


n (for light) → (Licht)diffusor m
References in classic literature ?
Unluckily, Governments cannot be enlightened, and a Government which regards itself as a diffuser of light is the least open to enlightenment.
Editor Casey Marshall enjoys the Aromatherapy Fan Diffuser offered by Mountain Rose Herbs.
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A typical jet pump mainly comprises of a primary (boost) port, a nozzle, a mixing chamber, a suction (secondary) port, a throat and a diffuser.
This study incorporated conventional, laminar, non-aspirating, and displacement diffuser types for a range of different air change rates from 15 to 150 ACH.
Cox and D'Antonio keep up with the rapid evolution of the state of the art in acoustic absorber and diffuser theory, design, and application, as well as the latest status of measurement methods, standards, and prediction models.
The airflow patterns, temperature distribution, and concentration of contaminants including the flow path of airborne pathogens in a patient room can depend on several interrelated factors, including the location and type of supply diffusers, supply airflow rates (air change rates) and associated diffuser throws, supply air temperature, size and locations of room return, bathroom exhaust flow rates, locations and strengths of various heat sources in a room, arrangement of furniture and other obstructions to airflow, and importantly relative location of a patient in the room.
Users simply fill each Scent-inal diffuser with a Scent-inal activator and then attach it to plants.
ALABAMA (CyHAN)- A special piece of hardware called a low-profile diffuser is being designed, built and tested at NASA's Marshall Space Flight Center in Huntsville, Alabama, for propellant tanks.