单词 | natrum |
释义 | † natrum Obs. rare. [a. F. natrum, var. of natron.] = natron.
1748J. Hill Hist. Fossils 387 The Natrum, or Nitrum of the Ancients, is a native Fossile substance. Ibid. 389 This native Alkaline Salt, which I have ventured to call the Natrum or true Nitre of the earliest ages. 1795Nicholson Dict. Chem. II. 514. |

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