Nitre; (spec. in early use) sodium carbonate (natron), washing soda (now historical). In later use: (Homeopathy) potassium nitrate (saltpetre).
| 单词 | θ7115 |
| 释义 | the world > the earth > minerals > types of mineral > carbonates > [noun] > natron (10) nitrumOE Nitre; (spec. in early use) sodium carbonate (natron), washing soda (now historical). In later use: (Homeopathy) potassium nitrate (saltpetre). soda1558 An alkaline substance obtained originally from the ashes of certain marine or other salt-impregnated plants, esp. species of Salsola, and now… salt sode1580 Old Chemistry. Particular substances of this class are distinguished by defining words (cf. sal, n.1); e.g. †salt ammoniac (= sal ammoniac, n.), †esse… nitre1587 Used allusively. With reference to the use of natron as a cleansing agent. Now rare and archaic. natron1684 Native hydrous sodium carbonate, NaCO3·10H2O, crystallizing in the monoclinic system and occurring chiefly in solution and as evaporative… anatron1706 Native carbonate of soda: see natron, n. natrum1748 = natron, n. Now only in Homeopathy, in compounds where the word is functionally equivalent to sodium. natre1756 = natron, n. varec1844 An impure carbonate of soda obtained from seaweed. natrium1924 = natron, n. rare. |
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