Webster’s Revised Unabridged Dictionary · 1913
Carrageen
Car′ra·geen′ (·rȧ·gēn′), Car′ri·geen′ (·rĭ·gēn′), n. A small, purplish, branching, cartilaginous seaweed (Chondrus crispus), which, when bleached, is the Irish moss of commerce. [Also written carragheen, carageen.]