Pleu·ri·sy n.  Med. An inflammation of the pleura, usually accompanied with fever, pain, difficult respiration, and cough, and with exudation into the pleural cavity.
  Pleurisy root. Bot. (a) The large tuberous root of a kind of milkweed (Asclepias tuberosa) which is used as a remedy for pleuritic and other diseases. (b) The plant itself, which has deep orange-colored flowers; -- called also butterfly weed.
  ◄ ►
  pleurisy root
       n : erect perennial of eastern and southern United States having
           showy orange flowers [syn: butterfly weed, orange
           milkweed, chigger flower, chiggerflower, tuber root,
            Indian paintbrush, Asclepias tuberosa]