Source : Webster's Revised Unabridged Dictionary (1913)

Terebrating \Ter"e*bra`ting\, a.
   1. (Zo["o]l.) Boring; perforating; -- applied to molluskas
      which form holes in rocks, wood, etc.

   2. (Med.) Boring; piercing; -- applied to certain kinds of
      pain, especially to those of locomotor ataxia.