1. noun /ˈnet(ə)l/
a) A herb of the genus Urtica, which is covered with stinging, mildly poisonous hairs, causing an instant rash.
b) The non-stinging plant deadnettle, also in the nettle family, Urticaceae (named after the above).
2. verb /ˈnet(ə)l/
a) Of the nettle plant and similar physical causes, to sting causing a rash in someone.
The children were badly nettled after playing in the field.
Wikipedia foundation.