The Collaborative International Dictionary of English v.0.48:
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. [1913 Webster]WordNet (r) 3.0 (2006):
gastrostomy n 1: surgical creation of an opening through the abdominal wall into the stomach (as for gastrogavage)