νυκτερ-ῐνός · nykter-inos — LSJ
by night, nightly, by night, at dead of night
by night, nightly, φυλακή Ar. V. 2 ; ξύνοδοι Id. Eq. 477 ; ἀείσματα Eup. 139 ; πυρετός Hp. Epid. 1.5 ; στρατηγός ( = νυκτοστράτηγος) Str. 17.1.12, CIG 2930 (Tralles) ; φρίξ POxy. 924.4 (iv A.D.) ; ἀναχώρησις Th. 4.128 ; σύλλογος Pl. Lg. 909a, cf. Arist. HA 592b8 ; φέγγος Aen.Tact. 10.25 ; ν. σύσσημα Id. 4.5 ; ν. γενέσθαι to happen by night, Ar. Ach. 1162 ; -ώτατόν τι τολμᾶν at dead of night, Luc. Icar. 21.
2 potent by night
Astrol., potent by night, Ptol. Tetr. 20.
3
Subst., νυκτερινός, ὁ, a kind of musical composition for the flute, used in Dionysiac worship, BCH 50.235 (Thasos, iii B.C.).