Any of various ores and salts of lead. Obsolete.
| 单词 | θ6406 | 
| 释义 | the world > the earth > minerals > ore > 			[noun]		 > metal ore > copper ore (20)		 molybdena1661 Any of various ores and salts of lead. Obsolete. copper ore1713 generally any ore of copper; spec. black oxide of copper, melaconite, n. Subcategories:— 			types of			(18)		 | 
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