noun
poisonous hair; urticating hair; urticating bristle
Refers to specialized hairs or bristles on certain caterpillars, spiders, or plants that cause irritation or poisoning upon contact.
この毛虫の毒毛に触れると、かぶれることがある。
Touching the urticating hairs of this caterpillar can cause a rash.
毒毛を持つ植物には注意が必要だ。
Be careful with plants that have poisonous hairs.