| wheal | 1. A more or less elongated mark raised by a stroke; also, a similar mark made by any cause; a weal; a wale. 2. <medicine> Specifically, a flat, burning or itching eminence on the skin, such as is produced by a mosquito bite, or in urticaria. Origin: Cf. Wale. <chemical> A mine. Origin: Cornish hwel. Source: Websters Dictionary (01 Mar 1998) |
|---|---|
| wheal-and-erythema reaction | The characteristic immediate reaction observed in the skin test; within 10 to 15 minutes after injection of antigen (allergen), an irregular, blanched, elevated wheal appears, surrounded by an area of erythema (flare). Synonym: wheal-and-flare reaction. (05 Mar 2000) |
| wheal-and-flare reaction | The characteristic immediate reaction observed in the skin test; within 10 to 15 minutes after injection of antigen (allergen), an irregular, blanched, elevated wheal appears, surrounded by an area of erythema (flare). Synonym: wheal-and-flare reaction. (05 Mar 2000) |
| whealworm | <zoology> The harvest mite; so called from the wheals, caused by its bite. Source: Websters Dictionary (01 Mar 1998) |