n. Itchy, swollen, red areas of the skin which can appear quickly in response to an allergen or due to other conditions
the GNU version of the Collaborative International Dictionary of English
n. The nettle rash, a disease characterized by a transient eruption of red pimples and of wheals, accompanied with a burning or stinging sensation and with itching; uredo.
The Century Dictionary and Cyclopedia
n. Nettle-rash; uredo; hives.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. an itchy skin eruption characterized by weals with pale interiors and well-defined red margins; usually the result of an allergic response to insect bites or food or drugs
Word Usage
"Chronic hives, also known as urticaria, are batches of raised, red or white itchy welts"