n.trillium of eastern North America having malodorous pink to purple flowers and an astringent root used in folk medicine especially to ease childbirth
同义词：purple trilliumred trilliumTrillium erectum
英汉双解大词典
birthroot/ˈbɜːθˌruːt/
1.
N（名词）
any of several North American plants of the genus Trillium, esp T. erectum, whose tuber-like roots were formerly used by the Native Americans as an aid in childbirth: family Trilliaceae 延龄草属植物; 北美植物，块状根茎曾被土著美洲人用来辅助分娩