Any plant whose foliage is covered with stinging, mildly poisonous hairs, causing an instant rash.
Certain plants that have spines or prickles:
Certain non-stinging plants, mostly in the family Lamiaceae, that resemble the species of Urtica:
Loosely, anything which causes a similarly stinging rash, such as a jellyfish or sea nettle.
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.
To pique, irritate, vex or provoke.