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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.
To celebrate the launch of their website, they are offering special discounts and offers on their luxury scented candles, bath bombs, reed diffusers, aroma diffusers, giftware and associated accessories.
Many of us deploy a variety of essential oil diffusers to help calm us during deadline (lavender), energize us when we're dragging (peppermint), and improve our moods when work isn't going quite as expected (sweet orange).
Figure 19 demonstrates static pressure contours at the exit plane of the diffuser for the design with the shortest and the longest diffusers.
Ideally in an operating room the supply air after exiting the diffusers should flow over the patient (surgical site) and surgical staff and exit through exhaust grills in a single pass without entrainment into and re-circulation with the supply air stream.
Among their topics are absorbers: applications and basic principles, measurement of reflections: scattering and diffusion, prediction of reflection including diffraction, geometric reflectors and diffusers, and absorbers and diffusers in rooms and geometric room acoustic models.
Today, consumers are expanding their scent engagement from being primarily a singular, personal encounter to also being a shared experience in their home with candles and reed diffusers.
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.
Each kit provides enough activator to re-charge all six diffusers up to four times, totaling 12 months' protection of shrubs, fruit trees, vegetables and evergreens.
One other product segment that has emerged from wellness worries, although from a slightly different direction, is aromatherapy diffusers.
In order to optimise such a system in a complex building like an airport, it saves time and money, and increases the likelihood of a successful outcome, when the type, location and air low of the displacement diffusers has been specified at an early stage.
Air distribution effect on thermal comfort parameters was investigated depending on changing the air supply diffusers type, angels and velocity.