Source : Webster's Revised Unabridged Dictionary (1913)

Euphuism \Eu"phu*ism\, n. [Gr. ? well grown, graceful; ? well +
   ? growth, fr. ? to grow. This affected style of conversation
   and writing, fashionable for some time in the court of
   Elizabeth, had its origin from the fame of Lyly's books,
   ``Euphues, or the Anatomy of Wit,'' and ``Euphues and his
   England.''] (Rhet.)
   An affectation of excessive elegance and refinement of
   language; high-flown diction.

Source : WordNet®

euphuism
     n 1: any artificially elegant style of language
     2: an elegant style of prose of the Elizabethan period;
        characterized by balance and antithesis and alliteration
        and extended similes with and allusions to nature and
        mythology