Definition of Sodium

1. Noun. A silvery soft waxy metallic element of the alkali metal group; occurs abundantly in natural compounds (especially in salt water); burns with a yellow flame and reacts violently in water; occurs in sea water and in the mineral halite (rock salt).

Exact synonyms: Atomic Number 11, Na
Generic synonyms: Metal, Metallic Element
Substance meronyms: Halite, Rock Salt, Brine, Saltwater, Seawater

Definition of Sodium

1. n. A common metallic element of the alkali group, in nature always occuring combined, as in common salt, in albite, etc. It is isolated as a soft, waxy, white, unstable metal, so readily oxidized that it combines violently with water, and to be preserved must be kept under petroleum or some similar liquid. Sodium is used combined in many salts, in the free state as a reducer, and as a means of obtaining other metals (as magnesium and aluminium) is an important commercial product. Symbol Na (Natrium). Atomic weight 23. Specific gravity 0.97.

Definition of Sodium

1. a metallic element [n -S] : SODIC [adj]

Medical Definition of Sodium

1. , element> Sodium is a soft, silvery, highly reactive alkali metal which has an atomic number of 11 and an atomic weight of 22.990. It is most commonly found in the form of salt, sodium chloride (NaCl). It was first identified as an element by the English scientist Sir Humphrey Davy in 1807. Sodium chloride is a critical nutrient in humans (it plays an important role in nerve function), but too much of it can cause health problems such as aggravating high blood pressure. Pure metallic sodium is a fire hazard, and it can explode if it comes into contact with water. Other commonly used sodium compounds include soda ash (sodium carbonate, Na2CO3), baking soda (sodium bicarbonate, NaHCO3) and caustic soda (sodium hydroxide, NaOH). Abbreviation: Na (09 Oct 1997)

Lexicographical Neighbors of Sodium

soddenness
soddennesses
soddens
soddier
soddies
soddiest
sodding
sodding(a)
soddy
sodger
sodgers
sodic
sodic
sodio-
sodium (current term)
sodium (current term)
sodium-24
sodium-calcium exchanger
sodium-hydrogen antiporter
sodium-potassium-exchanging atpase
sodium-potassium pump
sodium-responsive periodic paralysis
sodium-translocating NADH-quinone reductase
sodium-vapor lamp
sodium-vapour lamp
sodiums
sodium acetate
sodium acid carbonate
sodium acid citrate
sodium acid phosphate

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