‖n. [ NL. See Urtica. ] (Med.) 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. [ 1913 Webster ]
(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, Syn. urticaria, nettle rash, hives