Rectum (noun)

The final section of the large intestine, ending at the anus.

Origin:

Late middle english: from latin rectum "straight thing", neuter of rectus "straight".

Examples:

1. The doctor examined the patient's rectum for any signs of disease.
2. The rectum is the last part of the digestive tract.
3. The rectum is responsible for storing feces before they are expelled through the anus.
4. A rectal exam is a medical examination of the rectum.
5. Rectal cancer is a type of cancer that starts in the rectum.