Ipecacuanha \Ip`e*cac`u*an"ha\, 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).

Source: Webster's Revised Unabridged Dictionary (1913)