an·or·thite /əˈnɔrˌθaɪt/
鈣長石
A·nor·thite n. A mineral of the feldspar family, commonly occurring in small glassy crystals, also a constituent of some igneous rocks. It is a lime feldspar. See Feldspar.
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anorthite
n : rare plagioclastic feldspar occurring in many igneous rocks