ˌdekəˈrānēə, ˌdāk- noun
Usage: capitalized
Etymology: New Latin, from François Déscourian died 1740 French botanist + New Latin -ia
: a genus of annual or biennial herbs (family Cruciferae) of America and Europe differing from members of the genus Sisymbrium in having a pubescence of stellate or forked hairs and comprising the tansy mustards — see tansy mustard