Source : WordNet®

cuckoo flower
     n 1: a bitter cress of Europe and America [syn: {lady's smock}, {cuckooflower},
           {meadow cress}, {Cardamine pratensis}]
     2: common perennial native to Europe and western Asia having
        usually pink flowers with ragged petals [syn: {ragged
        robin}, {Lychnis flos-cuculi}, {Lychins floscuculi}]