牡丹 Traditional form: 牡丹 Pinyin (reading): mǔdan Definitions: tree peony (Paeonia suffruticosa) Characters: 牡 - male animal; key, door bolt 丹 - cinnabar, red, vermilion; pellet, powder Traditional characters: 牡 - male animal; key, door bolt 丹 - cinnabar, red, vermilion; pellet, powder