stinging hair

noun, Botany
1.
sting (def 18).
Examples from the web for stinging hair
  • When the skin touches the stinging hair, the end breaks-off and injects the poisonous liquid into the flesh.
British Dictionary definitions for stinging hair

stinging hair

noun
1.
a multicellular hair in plants, such as the stinging nettle, that injects an irritant fluid when in contact with an animal