νυκτέλιος · nyktelios — LSJ
nightly, epith. of Dionysus, from his nightly festivals, AP 9.524.14, Plu. E apud Delph. 2.389a, Paus. 1.40.6.
νυκτέλιον, τό, night-festival, Ἴσιδος POxy. 525 (ii A.D.): in pl., festival of Dionysus Νυκτέλιος, Plu. Aet.Gr. 2.291a.