sə̇ˈsimbrēəm noun
Etymology: Latin, a fragrant herb, perhaps mint, from Greek sisymbrion bergamot, watercress
1. capitalized : a genus of annual or biennial herbs (family Cruciferae) having a pubescence of simple unbranched hairs, lyrate pinnatifid leaves, and terete stems and comprising the hedge mustards — see descurainia
2. -s : any plant of the genus Sisymbrium