Source : Webster's Revised Unabridged Dictionary (1913)

Cypripedium \Cyp`ri*pe"di*um\ (s?p`r?-p?"d?-?m), n. [NL., fr.
   Cypris Venus + pes, pedis, foot.] (Bot.)
   A genus of orchidaceous plants including the lady's slipper.

Source : WordNet®

Cypripedium
     n : genus of chiefly American perennial leafy-stemmed orchids:
         lady's slippers; sometimes includes species of genus
         Paphiopedilum [syn: {genus Cypripedium}]