natriumn.

1839 A. Ure Dict. Arts 513 (table) Natrium (sodium). Na 2Na.

1849 M. Somerville Physical Geogr. (ed. 2) I. xv. 287 There are thirteen of these metalloids, namely—calcium, magnesium, aluminum, glucinum, thorium, yttrium, zirconium, strontium, barium, lithium, natrium, potassium, and silicium.

1871 E. Knorr tr. A. Petermann et al. Papers Eastern & Northern Extensions Gulf Stream (U.S. Hydrographic Office) iv. 178 In the spectroscope a bright line of greenish-yellow color showed, the position of which, with reference to the natrium line D, was ascertained.

1884 Philos. Trans. (Royal Soc.) 37 348 The light employed..was that from a Bunsen's gas-burner, the flame containing some natrium chloride.

1914 Mind 23 274 The only criticism that I have to make on her [sc. the translator's] work is that ‘Natrium’ in Loskij's article is not an English word, but is the German for Sodium.

1937 Television & Short-wave World Aug. 480/3 These layers might..consist of natrium, rubidium and caesium.

1941 Science 26 Dec. 612/2 While no serious fault is to be found with the translator's version the substitution of..sodium for natrium..and tungsten for wolfram..would have been preferable.

1982 Econ. Hist. Rev. 35 173 Although potassium salt could be made everywhere, there was a trade over very long distances in natrium salts.

1997 Proc. National Acad. Sci. U.S.A. 94 7617/2 Antibiotics were administered (Natrium cefazolinum) for 1 week after surgery.

1924 Sci. Monthly July 111 A galley of Phoenician merchants were skirting the Syrian coast with a cargo of natrium, that is, natural carbonate of soda.