资料来源 : Webster's Revised Unabridged Dictionary (1913)

Macrocystis \Mac`ro*cys"tis\, n. [NL. See {Macro-}, and {Cyst}.]
   (Bot.)
   An immensely long blackish seaweed of the Pacific
   ({Macrocystis pyrifera}), having numerous almond-shaped air
   vessels.