rocket cress roc·ketc·ress uncommon noun 1. noxious cress with yellow flowers; sometimes placed in genus Sisymbrium Synonymsyellow rocketrockcressrocket cressBarbarea vulgarisSisymbrium barbarea Related words Broader terms weed Parts Barbarea WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.
