Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. See hives.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Itchy, swollen, red areas of the skin which can appear quickly in response to an allergen or due to other conditions

from 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.

from The Century Dictionary and Cyclopedia

  • n. Nettle-rash; uredo; hives.

from 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

Etymologies

New Latin urticāria, from Latin urtica, nettle.
(American Heritage® Dictionary of the English Language, Fourth Edition)

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