Main Entry: ¹mer·cu·ri·al

Pronunciation: \(ˌ)mər-ˈkyu̇r-ē-əl\

Function: adjective

Date: 14th century

1 : of, relating to, or born under the planet Mercury
2 : having qualities of eloquence, ingenuity, or thievishness attributed to the god Mercury or to the influence of the planet Mercury
3 : characterized by rapid and unpredictable changeableness of mood <a mercurial temper>
4 : of, relating to, containing, or caused by mercury

synonyms see inconstant

— mer·cu·ri·al·ly \-ē-ə-lē\ adverb

— mer·cu·ri·al·ness noun