Mining and Geology. A vein; a line or layer of ore within a vein; a stratum or dyke of stone or rock.

Mining. A vein of metal ore.

Mining and Geology. A continuous vein or linear formation of ore, rock, etc.

? = sense 5b.

Mining. = lode, n. Also figurative.

A vein of a mineral or metal, a lode; (in later use) spec. a vein that has formed in a fracture of a pre-existing body of rock (= dike, n.1 9b).

Mining. An underground cavity filled with ore.

A length or stretch of something. Mining. Chiefly U.S. A deposit or vein of ore, mineral, etc.; a network of such deposits, an area devoted to mining.