The Collaborative International Dictionary
Noctule
Noctule \Noc"tule\ (?; 135), n. [F., fr. L. noctua a night owl, fr. nox, noctis, night.] (Zo["o]l.) A large European bat ( Vespertilio altivolans syn. Noctulina altivolans).
Wiktionary
noctule
n. A bat, of the genus (taxlink Nyctalus genus noshow=1), that lives in tree hollows.