Definitions for ragwortˈrægˌwɜrt, -ˌwɔrt
Random House Webster's College Dictionary
any of various composite plants of the genus Senecio, usu. bearing yellow, slender-rayed flower heads.
Origin of ragwort:
ragwort, tansy ragwort, ragweed, benweed, Senecio jacobaea(noun)
widespread European weed having yellow daisylike flowers; sometimes an obnoxious weed and toxic to cattle if consumed in quantity
butterweed, ragwort, Senecio glabellus(noun)
American ragwort with yellow flowers
Any of several species of wild flowering plants of the genus Senecio with yellow flowers.
a name given to several species of the composite genus Senecio