urtica i i a

(ur-tl-ka'ri-ah) [L. urtica, nettle.] Hives, nettle-rash; an eruption of itching wheals usually of systemic origin and following the ingestion of shellfish, pork, strawberries, etc., in individuals with an idiosyncrasy in respect of these substances, u. acu'ta, acute u., u. febrilis. u. bullo'sa, an eruption of wheals capped with an effusion of fluid under the epidermis, u. chron'ica, chronic u., a form in which the wheals recur frequently, with no' or very brief intervals of entire freedom, u. confer'ta, a form of u. in which the wheals are aggregated in groups, u. endem'ica, u. epidem'ica, u. caused by the nettling hairs of certain caterpillars, u. evan'ida, a form in which the eruption is of short dxiration. u. fact i'tia, artificial u., irritation such as the drawing of a pencil over the skin; autograph ism. u. febri'lis, febrile u., u. accompanied by slight constitutional symptoms, u. gi'gans, u. gig an'tea, giant u., an eruption of wheals of very large size; an gio neurotic edema, u. haemorrhag'ica, u. bullosa in which the serum contains more or le blood; purpura urticans. u. maculo'sa, a more or le chronic form of u.