Nereocystis
Nereocystis , proper noun
[New Latin See Nereid, and Cyst.]
(Botany) A genus of gigantic seaweeds.
Nereocystis Lutkeana, of the North Pacific, has a stem many fathoms long, terminating in a great vesicle, which is crowned with a tuft of long leaves. The stem is used by the Alaskans for fishing lines.