Source : Webster's Revised Unabridged Dictionary (1913)

Polytechnic \Pol`y*tech"nic\, a. [Gr. ?; poly`s many + ? an art:
   cf. F. polytechnique.]
   Comprehending, or relating to, many arts and sciences; --
   applied particularly to schools in which many branches of art
   and science are taught with especial reference to their
   practical application; also to exhibitions of machinery and
   industrial products.

Source : WordNet®

polytechnic
     n : a technical school offering instruction in many industrial
         arts and applied sciences [syn: {polytechnic institute},
         {engineering school}]