Noun | 1. fumeroot - delicate European herb with greyish leaves and spikes of purplish flowers; formerly used medicinallyFumaria officinalis, fumewort, fumitoryFumaria, genus Fumaria - annual herbs whose flowers have only one petal spurred at the baseherb, herbaceous plant - a plant lacking a permanent woody stem; many are flowering garden plants or potherbs; some having medicinal properties; some are pests | | 2.fumeroot - herb of northern Europe and Asia having erect racemes of red flowersCorydalis solida, fumewortgenus Corydalis, Corydalis - annual or perennial herbs of Himalayan China and South Africa |