Final answer:
An artificial opening in the abdomen for an ostomy is called a stoma, which is used in an ileostomy to divert waste into an external pouch.
Step-by-step explanation:
The artificial opening in the abdomen created for an ostomy is called a stoma. In an ileostomy, specifically, the distal ileum is brought through the abdominal wall to allow the watery chyme to be collected externally. This diversion is necessary when the lower parts of the digestive tract are not functioning properly or have been removed. The stoma is connected to a bag-like adhesive appliance to collect the output, which is essential for patients who cannot process waste through the normal digestive tract route.