单词 | greystone |
释义 | greystone/ˈɡreɪstəʊn/noun (A) A building stone of a grey colour. (b) Geology. A grey volcanic rock composed of feldspar (sometimes replaced by leucite or melilite) and augite or hornblende (now chiefly historical ). OriginLate 18th century. From grey + stone. |
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