• (a.) Related to, or resembling, the cabbage, or plants of the Cabbage family.
Bras`si·ca'ceous adjective [ Latin brassica cabbage.] (Botany) Related to, or resembling, the cabbage, or plants of the Cabbage family. 
belonging to the plant family Brassicaceae, an alternative name for the plant family Cruciferae. Cf. mustard family.