Noun has 2 senses

• american watercress(n = noun.plant) cardamine rotundifolia, mountain watercress - mat-forming perennial found in cold springs of the eastern United States;


• american watercress(n = noun.plant) american cress, barbarea praecox, barbarea verna, belle isle cress, early winter cress, land cress - of southwestern Europe; cultivated in Florida;