Source : Webster's Revised Unabridged Dictionary (1913)

Zein \Ze"in\, n. [Cf. F. z['e]["i]ne. See {Zea}.] (Chem.)
   A nitrogenous substance of the nature of gluten, obtained
   from the seeds of Indian corn ({Zea}) as a soft, yellowish,
   amorphous substance. [Formerly written {zeine}.]