| 单词 | ball vein |
| 释义 | > as lemmasball vein ΘΚΠ the world > the earth > minerals > ore > [noun] > metal ore > iron ore > specific shape ball-mine1702 pipe ore1709 ball veina1728 kidney ore1750 a1728 J. Woodward Attempt Nat. Hist. Fossils Eng. (1729) 224 The interior Substance of it is of a brown Colour, the exterior a brownish yellow... This yields near as much Iron as n. 3. They call it the Ball-Vein, [at] Battle in Sussex. 1778 Encycl. Brit. II. 972/2 Ball Vein,..a sort of iron ore..usually of a circular form in the perfect masses, thickest in the middle. < as lemmas |
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