Final answer:
The impaction of a gallstone in the small bowel is referred to as Gallstone ileus.
Step-by-step explanation:
The impaction of a gallstone in the small bowel is referred to as Gallstone ileus. Gallstone ileus occurs when a large gallstone obstructs the small bowel, leading to symptoms such as abdominal pain, nausea, and vomiting. This condition requires medical intervention, usually in the form of surgery, to remove the impacted gallstone.