Source : Webster's Revised Unabridged Dictionary (1913)

Cyclops \Cy"clops\ (s?"kl?ps), n. sing. & pl. [L. Cyclops, Gr.
   Ky`klwps (strictly round-eyed), pl. Ky`klwpes; ky`klos circle
   + 'w`ps eye.]
   1. (Gr. Myth.) One of a race of giants, sons of Neptune and
      Amphitrite, having but one eye, and that in the middle of
      the forehead. They were fabled to inhabit Sicily, and to
      assist in the workshops of Vulcan, under Mt. Etna.

   Note: Pope, in his translation of the ``Odyssey,'' uniformly
         spells this word Cyclop, when used in the singular.

   2. (Zo["o]l.) A genus of minute Entomostraca, found both in
      fresh and salt water. See {Copepoda}.

   3. A portable forge, used by tinkers, etc.

Source : WordNet®

Cyclops
     n 1: (Greek mythology) one of a race of giants having a single
          eye in the middle of their forehead
     2: minute free-swimming freshwater copepod having a large
        median eye and pear-shaped body and long antennae used in
        swimming; important in some food chains and as
        intermediate hosts of parasitic worms that affect man e.g.
        Guinea worms [syn: {water flea}]