Carduus Carduelis • care · · · Info · Definitions · Characters · · Carduus · · Text Latin · · Script 7 · · Length Definitions · · · (noun) genus of annual or perennial Old World prickly thistles. Synonyms: genus Carduus. · · Noun Definition 1 Characters · · C latin capital letter c U+0043 a latin small letter a U+0061 d latin small letter d U+0064 r latin small letter r U+0072 s latin small letter s U+0073 u latin small letter u U+0075