Mercurialis mercurialis • mercurialis annua · · · Info · Definitions · Characters · · Mercurialis · · Text Latin · · Script 11 · · Length 5 · · Syllables Definitions · · · (noun) a genus of slender herbs belonging to the family Euphorbiaceae. Synonyms: genus Mercurialis. · · Noun Definition 1 Characters · · M latin capital letter m U+004D a latin small letter a U+0061 c latin small letter c U+0063 e latin small letter e U+0065 i latin small letter i U+0069 l latin small letter l U+006C r latin small letter r U+0072 s latin small letter s U+0073 u latin small letter u U+0075