Macrocystis
Pronunciation : Mac`ro*cys"tis
Part of Speech : n.
Etymology : [NL. See Macro-, and Cyst.] (Bot.)
Definition : Defn: An immensely long blackish seaweed of the Pacific (Macrocystis pyrifera), having numerous almond-shaped air vessels.
Source : Webster's Unabridged Dictionary, 1913