Tanacetum tanacetone • tanacetyl · · · Info · Definitions · Characters · · Tanacetum · · Text Latin · · Script 9 · · Length Definitions · · · (noun) a large genus of plants resembling chrysanthemums; comprises some plants often included in other genera especially genus Chrysanthemum. Synonyms: genus Tanacetum. · · Noun Definition 1 Characters · · T latin capital letter t U+0054 a latin small letter a U+0061 c latin small letter c U+0063 e latin small letter e U+0065 m latin small letter m U+006D n latin small letter n U+006E t latin small letter t U+0074 u latin small letter u U+0075