1. (noun)tower mustard, tower cress, Turritis glabra, Arabis glabra or genus Arabis: erect cress widely distributed throughout Europe Synonyms: towercress, towermustard
2. (noun)tower cress, tower mustard, Arabis turrita European cress having stiff erect stems; sometimes placed in genus Turritis Synonyms: towercress, towermustard