Marrubium marrubium • marrubium vulgare · · · Info · Definitions · Characters · · Marrubium · · Text Latin · · Script 9 · · Length 4 · · Syllables Definitions · · · (noun) Old World aromatic herbs: horehound. Synonyms: genus Marrubium. · · Noun Definition 1 Characters · · M latin capital letter m U+004D a latin small letter a U+0061 b latin small letter b U+0062 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