noun. surgical creation of an opening through the abdominal wall into the stomach (as for gastrogavage).
1. Noun, singular or mass Percutaneous endoscopic gastrostomy, or "PEG" tubes, are inserted through the abdominal wall with the aid of an endoscope that has been passed from the mouth into the stomach 2. 2. Adjective A feeding tube (gastrostomy** tube) is placed through the abdomen into the gastrointestinal system, which allows the feeding of liquid foods for nourishment 1.