(n)small fast-growing spiny deciduous Chinese orange tree bearing sweetly scented flowers and decorative but inedible fruit: used as a stock in grafting and for hedges, Syn.trifoliata, Poncirus trifoliata, wild orange
(n)perennial plant of Europe and America having racemes of white or purplish flowers and intensely bitter trifoliate leaves; often rooting at water margin and spreading across the surface, Syn.marsh trefoil, bogbean, bog myrtle, Menyanthes trifoliata, buckbean