wheal


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wheal

 [hwēl]
a localized area of edema on the body surface, often with severe itching but usually of brief duration; it is the typical lesion of urticaria.
wheal and erythema reaction (wheal and flare reaction) the characteristic local cutaneous reaction consisting of an elevated, blanched wheal surrounded by a spreading “flare” of erythema that occurs within a few minutes at the site of a minor nonpenetrating skin injury and also in response to administration of allergen to an atopic individual; it is caused by release of histamine from mast cells.

wheal

(wēl),
A circumscribed, evanescent papule or irregular plaque of edema of the skin, appearing as an urticarial lesion, slightly reddened, often changing in size and shape and extending to adjacent areas, and usually accompanied by intense itching; produced by intradermal injection or test, or by exposure to allergenic substances in susceptible persons; also encountered in dermatitis herpetiformis (Darier sign).
Synonym(s): hives (2) , welt
[A.S. hwēle]

wheal

(hwēl) a localized area of edema on the body surface, often attended with severe itching and usually evanescent; it is the typical lesion of urticaria.

wheal

(wēl, hwēl)
n.
A small swelling on the skin, as from an insect bite, that usually itches or burns.

wheal

[wēl]
Etymology: AS, walu, pimple
smooth, slightly elevated area on the skin that is redder or paler than the surrounding skin. A wheal usually itches and can change size or shape or disappear within hours. It is the typical lesion of urticaria.

wheal

(wēl)
A circumscribed, evanescent papule or irregular plaque of edema of the skin, appearing as an urticarial lesion, slightly reddened, often changing in size and shape and extending to adjacent areas, and usually accompanied by intense itching; produced by intradermal injection or test, or by exposure to allergenic substances in those susceptible.
Synonym(s): hives (2) , welt.
[A.S. hwēle]

wheal

a mark on the skin after a skin test, an area of EDEMA.

Wheal

A smooth, slightly elevated area on the body surface, which is redder or paler than the surrounding skin.
Mentioned in: Hives

wheal

(wēl)
Circumscribed, evanescent papule or irregular plaque or dermal edema, appearing as an urticarial lesion, slightly reddened, often changing in size and shape and extending to adjacent areas, and usually accompanied by intense itching; produced by intradermal injection or test, or by exposure to allergenic substances in susceptible people.
[A.S. hwēle]

wheal (w[h]ēl),

n edematous elevation of the skin or mucosa. See also urticaria.

wheal

a localized area of edema on the body surface, often attended with severe itching and usually evanescent. It is the typical lesion of urticaria.

wheal and flare reaction
a central blanching surrounded by an erythematous zone of varying diameter, sometimes with pseudopodia, observed on the skin in response to intradermal exposure to allergen (antigen). A basis for detecting particular immediate hypersensitivities in an individual. Produced following release of histamine from mast cells bearing IgE bound to Fc receptor.
References in periodicals archive ?
Wheal, Hampshire's most improved player of the season, continued to find blistering pace and bounce on a pitch bred to offer the spinners a match-winning performance - his four-over evening blast commanding figures of two for two.
The results indicated that average of wheal diameter after 30 min from the start in mice received PBS and histamine acid phosphate as negative and positive controls were 5.
For milk and eggs, the larger the wheal, the more sensitive the skin test
Prosecutor Nigel Wilkins told yesterday's hearing that Wheal had previously been jailed for four months in 2006 after pleading guilty to similar offences.
Wheal sizes were measured 20 and 60 min after injection of active test solutions.
The argument between Sir Paul's companions and Mr Wheal continued and police stepped in.
5) Dilute antigen extract is injected into the dermis, and a superficial wheal forms.
The red wheal signals an allergic hypersensitivity to food residues on the smoocher's mouth.
In January 1992, more than 10 million gallons of heavily contaminated water burst from the closed Wheal Jane workings, causing serious pollution.
Rashleigh acquired several of the bournonites from Wheal Boys ("Wheal" = mine), St.
For the next 10 years, Veolia Water Solutions & Technologies (Veolia Water) will operate and maintain the water treatment plant at the Wheal Jane Mine located near Truro in Cornwall, England.
To keep economic wheal moving, the governor informed that uninterrupted electricity was being provided in Economic zones.