Source : Webster's Revised Unabridged Dictionary (1913)

Hypophysis \Hy*poph"y*sis\, n. [NL., fr. Gr. ? under + ? nature,
   origin.]
   1. (Anat.) See {Pituitary body}, under {Pituitary}.

   2. (Med.) Cataract.

Source : WordNet®

hypophysis
     n : the master gland of the endocrine system; located at the
         base of the brain [syn: {pituitary}, {pituitary gland}, {pituitary
         body}]
     [also: {hypophyses} (pl)]