chalcomenite

noun

chal·​co·​me·​nite

ˌkalkəˈmēˌnīt

plural -s

: a mineral CuSeO₃.2H₂O consisting of copper selenite and occurring in blue crystals

Word History

Etymology

French chalcoménite, from chalc- + Greek mēnē moon + French -ite; from its being a compound of selenium, which is named for the moon

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