noun
Zoological term for the flexible appendages of animals such as octopuses, insects, or snails.
タコは触手で獲物を捕まえる。
An octopus catches its prey with its tentacles.
カタツムリの触手は目がある。
A snail's tentacles have eyes on them.
noun
touching with one's hand; feeling; sensing
Figurative or literary use for reaching out to touch or sense something, often implying a cautious or exploratory touch. Less common than the zoological sense.
彼は暗闇の中で触手を伸ばして壁を探った。
He extended his hand in the darkness and felt for the wall.