olivenite

noun

oliv·​en·​ite

ōˈlivəˌnīt,

ˈäləvəˌ-

plural -s

: a mineral Cu₂(AsO₄)(OH) consisting of a basic arsenate of copper that is olive green, dull brown, or yellowish in color

Word History

Etymology

German olivenit, from olive (from Latin oliva) + -it -ite

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