sodium B1 Topic:Chemistry US /ˈsoʊ.di.əm/ UK /ˈsəʊ.dɪəm/ See IPA manual Freq #12395 Meanings 1 noun Employing sodium. From Keighley onwards we had obviously returned to civilisation, for the surrounding country was now studded with the sodium street lights of suburbia and a thickening industrial haze was blotting out the moon. 2 noun a silvery soft waxy metallic element of the alkali metal group 3 noun The chemical element (symbol Na) with an atomic number of 11 and atomic weight of 22.990. It is a soft, waxy, silvery, reactive alkali metal that is never found unbound in nature. Thesaurus Synonyms natrium Word family Derived forms decasodiumdisodiumdodecasodiumhemisodiumheptasodiumhexasodiummethylsodiummonosodiumnonsodiumoctasodiumorganosodiumpentasodium Related forms amphiboleboraxcryolitehalitenatronsaltsodazeolite Appears in Phrases (2) See all sodium fluoride a sodium salt containing fluoride, used in water fluoridation and dental products Noun + noun sodium silicate a glassy sodium compound used in solutions for adhesives and protective coatings Noun + noun Etymology Coined by British chemist Humphry Davy in 1808, from soda + -ium. Topics Chemistry General Vocabulary External links Google Images Cambridge Dictionary Wiktionary # sodium **Type:** Word **Level:** B1 **Part of speech:** noun **IPA (US):** /ˈsoʊ.di.əm/ **IPA (UK):** /ˈsəʊ.dɪəm/ **Frequency rank:** 12395 ## Meanings 1. Employing sodium. 2. a silvery soft waxy metallic element of the alkali metal group 3. The chemical element (symbol Na) with an atomic number of 11 and atomic weight of 22.990. It is a soft, waxy, silvery, reactive alkali metal that is never found unbound in nature. ## Examples - From Keighley onwards we had obviously returned to civilisation, for the surrounding country was now studded with the sodium street lights of suburbia and a thickening industrial haze was blotting out the moon. ## Synonyms - natrium ## Derived Forms - decasodium - disodium - dodecasodium - hemisodium - heptasodium - hexasodium - methylsodium - monosodium - nonsodium - octasodium - organosodium - pentasodium ## Related Forms - amphibole - borax - cryolite - halite - natron - salt - soda - zeolite ## Etymology Coined by British chemist Humphry Davy in 1808, from soda + -ium. ## Topics - Chemistry - General Vocabulary markdown