Source : Webster's Revised Unabridged Dictionary (1913)

Gastrostomy \Gas*tros"to*my\, n. [Gastro- + Gr. ? mouth.]
   (Surg.)
   The operation of making a permanent opening into the stomach,
   for the introduction of food.

Source : WordNet®

gastrostomy
     n : surgical creation of an opening through the abdominal wall
         into the stomach (as for gastrogavage)