Hieracium Hieracian • hieracosphinx · · · Info · Definitions · Characters · · Hieracium · · Text Latin · · Script 9 · · Length Definitions · · · (noun) large genus of perennial hairy herbs of Europe to western Asia to northwestern Africa and North America; few are ornamental; often considered congeneric with Pilosella. Synonyms: genus Hieracium. · · Noun Definition 1 Characters · · H latin capital letter h U+0048 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 m latin small letter m U+006D r latin small letter r U+0072 u latin small letter u U+0075