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单词 natrum
释义

natrumn.

Brit. /ˈneɪtrəm/, U.S. /ˈneɪtr(ə)m/
Origin: Apparently a variant or alteration of another lexical item. Etymon: natron n.
Etymology: Apparently alteration of natron n., perhaps after nitrum n. Compare French natrum (1761 or earlier).
= natron n. Now only in Homeopathy, in compounds where the word is functionally equivalent to sodium.
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the world > the earth > minerals > types of mineral > carbonates > [noun] > natron
nitrumOE
soda1558
salt sode1580
nitre1587
natron1684
anatron1706
natrum1748
natre1756
varec1844
natrium1924
1748 J. Hill Gen. Nat. Hist. I. 387 The Natrum, or Nitrum of the Ancients, is a native Fossile substance.
1748 J. Hill Gen. Nat. Hist. I. 389 This native Alkaline Salt, which I have ventured to call the Natrum or true Nitre of the earliest ages.
1768 Philos. Trans. 1767 (Royal Soc.) 57 480 The fossil [alkali] or mineral, called likewise soda and natrum.
1795 W. Nicholson Dict. Chem. I. 514 Natron or Natrum, a native alkaline salt, of the nature of the mineral, or marine alkali, which is found crystallized in Egypt... In the new nomenclature of our College of Physicians, the mineral alkali is called natron.
1850 Jahr's New Man. Homeopathic Pract. (ed. 3) i. 14 Natrum, against debility and dyspepsia in drunkards.
1860 Sci. Amer. 4 Aug. 87/2 Conductibility of the Metals... Tin..Steel..Platinum..Natrum.
1928 T. M. Neatby tr. J. Voorhoeve Homœopathy in Pract. 205 Natrum sulph. 6× for acidity and burning sensation.
1991 C. Hammond How to use Homeopathy (BNC) 69 Natrum Phosphoricum 6× three or four times a day given as well as the indicated remedy will often help the body to rectify this acid imbalance.
1996 S. Lavery et al. Hamlyn Encycl. Complementary Health 200/1 Natrum sulph. when symptoms include gout.
This entry has been updated (OED Third Edition, June 2003; most recently modified version published online March 2022).
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n.1748
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