English

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

 

mercury

 noun
noun
BrE BrE//ˈmɜːkjəri//
 
; NAmE NAmE//ˈmɜːrkjəri//
 
[uncountable] (symbol Hg)
 
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a chemical element. Mercury is a poisonous silver liquid metal, used in thermometers. Studies show very high levels of mercury in local dolphins. Word Origin Middle English: from Latin Mercurius, from merx, merc- ‘merchandise’. Mercury is the Roman god of eloquence, skill, trading and thieving, as well as being herald and messenger of the gods.
See the Oxford Advanced American Dictionary entry: mercury