Adjacent Words

Ammonium definitions

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Webster's 1828 Dictionary

AMMO'NIUM, n. A name given to the supposed metallic basis of ammonia. If mercury, at the negative pole of a galvanic battery, is placed in contact with a solution of ammonia, and the circuit is completed, an amalgam is formed, which, at the temperature of 70 degrees or 80 degrees of Fahrenheit, is of the consistence of butter, but at the freezing point is a firm and crystallized mass. This amalgam is supposed to be formed by the metallic basis, ammonium.

WordNet (r) 3.0 (2005)

n
1: the ion NH4 derived from ammonia; behaves in many respects like an alkali metal ion [syn: ammonium, ammonium ion]

Merriam Webster's

noun Etymology: New Latin, from ammonia Date: 1808 an ion NH₄⁺ derived from ammonia by combination with a hydrogen ion and known in compounds (as salts) that resemble in properties the compounds of the alkali metals

Merriam Webster's

geographical name — see Siwa

Oxford Reference Dictionary

n. the univalent ion NH4+, formed from ammonia. Etymology: mod.L (as AMMONIA)

Webster's 1913 Dictionary

Ammonium Am*mo"ni*um, n. [See Ammonia.] (Chem.) A compound radical, NH4, having the chemical relations of a strongly basic element like the alkali metals.