The Collaborative International Dictionary of English v.0.48:

Pelasgian \Pe*las"gi*an\, Pelasgic \Pe*las"gic\, a. [L.
   Pelasgus, Gr. Pelasgo`s a Pelasgian.]
   1. Of or pertaining to the Pelasgians, an ancient people of
      Greece, of roving habits.
      [1913 Webster]

   2. (Zool.) Wandering.
      [1913 Webster]