nepenthes UK /nɪˈpɛnθiːz/US /nəˈpɛnθiz/ noun2 •A Southeast Asian carnivorous plant of the genus Nepenthes; a monkey cup or tropical pitcher plant.And how marvellous were the shapes of the nepenthes, how beautiful the colour, how delicate in form! — 1863 •A drug mentioned in Homer's Odyssey (c. 8th century B.C.E.) as bringing relief from anxiety or grief; hence, any drug or substance seen as bringing welcome forgetfulness or relief.Read the Scripture […] T'is the best Nepenthes, surest cordiall, sweetest alteratiue, presentest diuerter: […] — 1624