Definition of ammonia noun from the Oxford Advanced Learner's Dictionary



BrE BrE//əˈməʊniə//
; NAmE NAmE//əˈmoʊniə//
[uncountable] (symbol NH3)
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a gas with a strong smell; a clear liquid containing ammonia, used as a cleaning substance Word Originlate 18th cent.: modern Latin, from sal ammoniacus, ‘salt of Ammon’. This came from the Greek word ammōniakos ‘of Ammon’, used as a name for the salt and gum obtained near the temple of Jupiter Ammon at Siwa in Egypt.
See the Oxford Advanced American Dictionary entry: ammonia