Source : Webster's Revised Unabridged Dictionary (1913)

Lady's smock \La"dy's smock"\ (Bot.)
   A plant of the genus {Cardamine} ({C. pratensis}); cuckoo
   flower.

Source : WordNet®

lady's smock
     n : a bitter cress of Europe and America [syn: {cuckooflower}, {cuckoo
         flower}, {meadow cress}, {Cardamine pratensis}]