alnoite
noun
al·no·ite
ˈalnəˌwīt
plural -s
: a rare basaltic dike rock of the composition of a melilite-basalt having phenocrysts of biotite, augite, and olivine in a groundmass of melilite and augite
Word History
Etymology
German alnöit, from Alnö, island of Sweden, its locality + German -it -ite
First Known Use
1888, in the meaning defined above