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]

The Collaborative International Dictionary of English v.0.48:

Redhead \Red"head`\ (-h?d`), n.
   1. A person having red hair.
      [1913 Webster]

   2. (Zool.)
      (a) An American duck (Aythya Americana) highly esteemed
          as a game bird. It is closely allied to the
          canvasback, but is smaller and its head brighter red.
          Called also red-headed duck. American poachard,
          grayback, and fall duck. See Illust. under
          Poachard.
      (b) The red-headed woodpecker. See Woodpecker.
          [1913 Webster]

   3. (Bot.) A kind of milkweed (Asclepias Curassavica) with
      red flowers. It is used in medicine.
      [1913 Webster]

WordNet (r) 3.0 (2006):

Asclepias curassavica
    n 1: tropical herb having orange-red flowers followed by pods
         suggesting a swallow with outspread wings; a weed
         throughout the tropics [syn: blood flower, swallowwort,
         Asclepias curassavica]