cruciferous /kɹuˈsɪfəɹəs/ adjective2 •Of or relating to the crucifer plants or products from these plants; of the family Cruciferae, the cabbage family, including cabbage and mustard.And cruciferous vegetables—broccoli, cauliflower, brussels sprouts, cabbage—are loaded with sulforaphane. — 2007 •Bearing a cross.