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

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