单词 | silver thread |
释义 | > as lemmassilver thread silver thread n. used attributively to denote a variety of ironstone. ΘΚΠ the world > the earth > minerals > ore > [noun] > metal ore > iron ore > hard ironstone1522 mine-stone1612 dogger1670 gubbin1712 iron clay1750 small balls1793 penny-stone1803 mine-stuff1839 silver thread1855 1855 J. Phillips Man. Geol. 193 Blue flats, silver thread, and diamond ironstone. < as lemmas |
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