Nĕph'e-līne, n.

(Synop., § 130), n. [Fr. néphéline, from Gr. νεφέλη, cloud. Cf. NEBULA.] (Min.) A mineral occurring at Vesuvius, in glassy crystals, nearly transparent, having the form of six-sided prisms; also, in many regions, in grayish or greenish masses, having a greasy luster. Dana.