Emily Dickinson Lexicon
Definition for HY'PER-STENE, or HY'PER-STHENE
HY-PER-SAR-CO'SISHY-PER-THYR'I-ON
HY'PER-STENE, or HY'PER-STHENE, n. [So named from its difficult frangibility. Gr. υπερ and σθενος.]
A mineral, Labrador hornblend, or schillerspar. Its color is between grayish and greenish black, but nearly copper-red on the cleavage. Jameson. Kirwan. Phillips.
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