sodium

so·di·um

noun \ˈsō-dē-əm\

Definition of SODIUM

: a silver-white soft waxy ductile element of the alkali metal group that occurs abundantly in nature in combined form and is very active chemically — see element table

Origin of SODIUM

New Latin, from English soda

First Known Use: 1807

Other Chemical Engineering Terms

alkali, cation, decant, hygroscopic, isotope, oxidize, slurry, solute, viscous

Rhymes with SODIUM

odium, podium, rhodium

so·di·um

noun \ˈsōd-ē-əm\   (Medical Dictionary)

Medical Definition of SODIUM

: a silver white soft waxy ductile element of the alkali metal group that occurs abundantly in nature in combined form and is very active chemically—symbol Na; see element table

sodium

noun    (Concise Encyclopedia)

Chemical element, one of the alkali metals, chemical symbol Na, atomic number 11. A very soft, silvery white metal, the sixth most abundant element on Earth, it occurs mainly as halite, never free. Extremely reactive, it is used as a chemical reagent and raw material, in metallurgy, as a heat exchanger (in nuclear power generators and certain types of engines), and in sodium-vapour lamps (see electric discharge lamp). Sodium is essential for life but rarely deficient in diets; high intake is linked to hypertension. Sodium in compounds, many of great industrial importance (including bicarbonate of soda, caustic soda, sodium nitrate [Chile saltpetre], and sodium chloride), has valence 1. Sodium carbonate, one of the four most important basic chemical commodities, is used in making glass, detergents, and cleansers. Sodium hypochlorite, familiar as household bleach, is also used to bleach paper pulp and textiles, to chlorinate water, and in some medicines. The sulfate is used in the kraft process and also used to make paperboard, glass, and detergents. The thiosulfate (hyposulfite, or “hypo”) is used to developed photographs.