hypersthene

noun hy·per·sthene \ˈhī-pərs-ˌthēn\

Definition of HYPERSTHENE

: an orthorhombic grayish or greenish black or dark brown pyroxene

— hy·per·sthe·nic \ˌhī-pərs-ˈthe-nik, -ˈthē-\ adjective

French hypersthène, from Greek hyper- + sthenos strength

First Known Use: circa 1808

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