The Collaborative International Dictionary of English v.0.48:

Ipecacuanha \Ip`e*cac`u*an"ha\
   ([i^]p`[-e]*k[a^]k`[-u]*[a^]n"[.a]), n. [Pg. ipecacuanha (cf.
   Sp. ipecacuana); fr. Braz. ipe-kaa-guena, prop., a creeping
   plant that causes vomiting.] (Med. & Bot.)
   The root of a Brazilian rubiaceous herb (Cepha["e]lis
   Ipecacuanha), largely employed as an emetic; also, the plant
   itself; also, a medicinal extract of the root. Many other
   plants are used as a substitutes; among them are the black or
   Peruvian ipecac (Psychotria emetica), the white ipecac
   (Ionidium Ipecacuanha), the bastard or wild ipecac
   (Asclepias Curassavica), and the undulated ipecac
   (Richardsonia scabra).
   [1913 Webster]