Source : Webster's Revised Unabridged Dictionary (1913)

Carageen \Car"a*geen`\ or Caragheen \Car"a*gheen`\, n.
   See {Carrageen}.

Source : WordNet®

carageen
     n : dark purple edible seaweed of the Atlantic coasts of Europe
         and North America [syn: {Irish moss}, {carrageen}, {carragheen},
          {Chondrus crispus}]