cypripedium n genus of chiefly American perennial leafy-stemmed orchids: lady's slippers; sometimes includes species of genus Paphiopedilum Usage(s) Mostly herbals, these included cypripedium (lady's slipper), once used as a sedative in hysteria and neuralgia; diabetes weed, and corn smut (derived from a fungus), which . Synonym(s) Cypripedium genus Cypripedium