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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 ?
And anyway cycling, per se, was right because without it the planet would become a steamy, fog-bound hot house and die.
5 Northampton Wanderers 74 COVENTRY'S second string Nighthawks suffered a 13-try hammering by a strong Northampton outfit at fog-bound Butts Park last night.
Daniel Parr, 25, admitted he was driving his Megabus too fast on the fog-bound M5 when the accident that claimed the life of 30-year-old Raymond Vaughan happened.
All four were returning from a family funeral when their car became the 15th of 34 vehicles to collide on the fog-bound M5 near Taunton in Somerset.
Champions Red Bull made a slow start, with Mark Webber one second off the pace after new parts were delayed by a plane grounded for hours in fog-bound Britain.
I thought of Lumsden's London on a November trip to a fog-bound Istanbul.
32 SEAN LONG enjoyed a dream debut on his return to Knowsley Road in a fog-bound Engage Super League contest on Saturday night.
Left, no play was possible for the first three hours at the fog-bound Belfry Pictures, TIM EASTHOPE
The Potters had Ricardo Fuller sent off for an elbow shortly after Griffin's thumping strike but held on for victory at a fog-bound Britannia Stadium.
The Scarlets toppled Wasps 21-13 at a fog-bound Stradey Park five days ago, but they now need a repeat performance to keep pressure on pool leaders Toulouse.
Subsequently appearing for breakfast in a striped shirt of the inmate variety, Stanley seems as haunted by things past as Meg is fog-bound in the present.
THE MARTYRS staged a grandstand finale to overcome Chelmsford with two extremely late goals at a fog-bound Penydarren Park.