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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!

More discussions about fog
References in periodicals archive ?
On a cold winter's day the 43-year-old engineer said: It can be perfect weather here but if the bases in East Anglia are fog-bound they don''t take off.
Simpson began the final round at fog-bound Olympic four strokes off the pace and he teed off in the fourth-last group of the day.
No one knows how many others had crashed in that windy, fog-bound place over the previous four years.
But his home is the often fog-bound Victorian seaport of Eureka, where there are said to be more artists per capita than anywhere else in the state.
That's one of three changes from the side that lost 16-9 to Munster at a fog-bound Thomond Park in the Magners League last weekend.
With the Limekilns fog-bound, Sir Michael Stoute stuck to the Al Bahathri Polytrack, where his Derby winner Workforce continued his exercise towards a comeback in the Qatar Prix de l'Arc de Triomphe by moving well with his companion.
Back on the suburban courts, the lazy puck-pock of tennis balls spoke of eager limbs ready to entwine, but down in the rasping, fog-bound town, even newer limbs bounced on the tightsprung seats of the picture palace, where good men were about to die in the full poetry of courage.
Both Rozhen and Botev peaks are fog-bound, with moderate winds.
Tito has never won a trophy in his professional career, but did play in the fog-bound Super 12 final for the Hurricanes against the Crusaders in 2006.
They nearly did so in their last away match - a fog-bound gut-wrencher at Bedford, where the hosts scored and converted a try with virtually the last play to win 17-15.
But when Fred sings "They Can't Take That Away" to her on a fog-bound ferry, all silliness is dispelled by the sheer force of the moment.
Soulful music played by a tenor sex adds to the ambiance of this tale set in fog-bound San Francisco.