arsoite

noun ar·so·ite \ˈär(ˌ)sōˌīt\

Definition of arsoite

plural

-s

  1. :  a dark gray porous rock consisting of trachyandesite containing phenocrysts of andesine, sanidine, diopside, and a little olivine in a trachytic groundmass of sanidine, a little oligoclase, much diopside, and magnetite

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Origin and Etymology of arsoite

German arsoit, from Arso, town on the island of Ischia, Italy + German -it -ite


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