a gemstone consisting of a quartz-like form of hydrated silica, typically semi-transparent and showing many small points of shifting colour against a pale or dark ground
蛋白石。
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opaln.蛋白石
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oraladj.口头的;口语的;口的;口服的;口述的;没有文字的;用口的;口欲的;口唇的
"late 16th cent.: from French