davyneMin.|ˈdeɪvɪn| [ad.Ital.davina, named 1825 after Sir Humphry Davy.] A variety of nephelite, from Vesuvius. 1826Amer.Jrnl.Sc. XI. 257 Davina (Davyne).1869Phillips Vesuv. x. 292 Davyne, a hydrous nepheline, is found in cavities of ejected blocks of gray lava on Somma.