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1. a colloid system in which the dispersion medium is a gas and the dispersed particles are liquid.
2. an artifact seen on a radiograph caused by unintentional exposure to reducing contrast.


(fog) a colloid system in which the dispersion medium is a gas and the disperse particles are liquid.


Droplets dispersed in the atmosphere or a respiratory device.


Abbreviation for freezing of gait.

light fog

(līt fawg)
Black areas seen on a radiograph when a film is exposed to white light before processing.
Synonym(s): fog.

fog (fogging),

fog, chemical,
n See film fault.
fog, dyschroic,
fog, light,
n See film fault.
fog, radiation,
n the film darkening caused by radiation from sources other than intentional exposure to the primary beam; e.g., film may be exposed to scatter radiation, or accidental exposure may occur if stored film is not protected from radiation.


1. a colloid system in which the dispersion medium is a gas and the dispersed particles are liquid.
2. regrowth after harvesting of a cereal crop. Called also aftermath, feg.
3. obscuring opacity on an x-ray film.

basic fog
blackening of an unexposed x-ray film after development.
x-ray fog
local or general exposure to extraneous radiation, light or chemical action which is additional to the true photographic image. Leads to spoiling of the x-ray image.

Patient discussion about fog

Q. In what way the brain fog symptom associated with fibromyalgia? In what way the brain fog symptom associated with fibromyalgia? What are the other symptoms of fibromyalgia?

A. memory loss is also associated with Fibromyalgia...lack of concentration and you just feel like you are in a fog...can't remember....can't think. Our standing joke at my house is "I am in the "fog" today. The one thing my doctor ALWAYS reminds me of fibro affects people differently, remember you may not have all the sympoms or you may have ones others don't but fibromyalgia is widespread pain that has lasted 3 months or more, it is pain of the fibrous tissue - ligiments, tendons and muscles. You feel stiff and achy all over. There are trigger points such as neck, shoulders, spine and hips. Chronic fatigue taht is possibly related to the disturbed sleep patterns. Most suffers I have talked to have restless leg syndrome and headaches. Irritable bowl is associated but on that one I am lucky I haven't had the problem but have had swolling problems and vision problems...I hope this helps. Good Luck!

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References in periodicals archive ?
Morning clouds and coastal fog will give way to clearer skies this afternoon.
Coastal fog has also hindered air tanker and helicopter operations, Turner said, which the Forest Service and state Department of Forestry and Fire Protection crews are relying on to knock down the flames creeping through brush and timber in the steeply sloping terrain.
The area's year-round mild climate, away from coastal fog, makes these places especially popular with golf and tennis buffs.
Ideally situated in Carmel Valley, the development has the advantage of easy access to Carmel and the magnificent coastline of the Monterey Peninsula, while being far enough inland to escape from frequent coastal fog.
Bloom is heaviest in sun in the coastal fog belt, but foliage looks best with some mid-day shade in hot sites or climates.
For instance, Livermore has gravelly soil and a climate that mixes coastal fog with hot, arid temperatures.
You can plant them in full sun or bright to medium shade in the coastal fog belt; inland, they need filtered light or afternoon shade.
Plant tree ferns in a wind-protected spot in bright, indirect light or open shade (they'll tolerate full sun in the coastal fog belt) in loose, well-drained soil amended with organic matter.
Quail Hill Vineyard is blessed with some of the oldest Pinot Noir plantings in the appellation, a desirable combination of Sebastopol Sandy Loam and Blucher series soils, cool coastal fog, and a diversity of site orientations.
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