An adenoma that arises from the colon or rectum. The group of colorectal adenomas includes tubular, villous, and tubulovillous adenomas, traditional serrated adenomas, sessile serrated adenomas/polyps, and familial adenomatous polyposis. The disease is colorectal adenoma (MONDO_0005484, a Monarch Disease Ontology entry). Also known as: adenoma of large bowel, adenoma of large intestine, adenoma of the large bowel, adenoma of the large intestine, colorectum adenoma, large bowel adenoma, large intestine adenoma.