urticaria
Pronunciation: /ˌəːtɪˈkɛːrɪə/
noun
- a rash of round, red weals on the skin which itch intensely, sometimes with dangerous swelling, caused by an allergic reaction, typically to specific foods. Also called nettlerash or hives.
Origin:
late 18th century: modern Latin, from Latin urtica 'nettle', from urere 'to burn'