carragheen

from WordNet (r) 3.0 (2006)

carragheen
    n 1: dark purple edible seaweed of the Atlantic coasts of Europe
         and North America [syn: {Irish moss}, {carrageen},
         {carageen}, {carragheen}, {Chondrus crispus}]

from The Collaborative International Dictionary of English v.0.48

Carrageen \Car"ra*geen`\, Carrigeen \Car"ri*geen`\, n.
   A small, purplish, branching, cartilaginous seaweed
   ({Chondrus crispus}), which, when bleached, is the {Irish
   moss} of commerce. [Also written {carragheen}, {carageen}.]
   [1913 Webster] Carrageenan