| 单词 | saltpetre |
| 释义 | saltpetre n. (US saltpeter) potassium nitrate, a white crystalline salty substance used in preserving meat and as a constituent of gunpowder. Etymology: ME f. OF salpetre f. med.L salpetra prob. for sal petrae (unrecorded) salt of rock (i.e. found as an incrustation): assim. to SALT |
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