The principal vein in a mine. Obsolete. rare.
| 单词 | θ6345 | 
| 释义 | the world > the earth > minerals > mineral deposits > 			[noun]		 > vein > principal (4)		 master-vein1670 The principal vein in a mine. Obsolete. rare. master lode1671 mother-lode1863 Mining. The principal vein of ore in a working. masterly lode1868 a main lode (cf. master lode n. at master, n.1 adj.compounds 2a).  | 
	
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