noctule UK /ˈnɒktjuːl/US /ˈnɑkt͡ʃul/ noun1 •A bat, of the genus Nyctalus, that lives in tree hollows.We were all still growing used to the night-time, the blue-veined hours of morning that lay only lightly, the white spiders and noctule bats. — 2019 formsnoctules