The Collaborative International Dictionary of English v.0.48:

Glaciate \Gla"ci*ate\, v. t.
   1. To convert into, or cover with, ice.
      [1913 Webster]

   2. (Geol.) To produce glacial effects upon, as in the scoring
      of rocks, transportation of loose material, etc.
      [1913 Webster]

   Glaciated rocks, rocks whose surfaces have been smoothed,
      furrowed, or striated, by the action of ice.
      [1913 Webster]