cuckoo flower cuc·koof·lo·wer uncommon noun 1. a bitter cress of Europe and America Synonymslady's smockcuckooflowercuckoo flowermeadow cressCardamine pratensis 2. common perennial native to Europe and western Asia having usually pink flowers with ragged petals Synonymsragged robincuckoo flowerLychnis flos-cuculiLychins floscuculi Related words Broader terms lychnisbittercress WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.
