Final answer:
The combining form for gland is 'adeno-' and when combined with the suffix for a tumor '-oma', it creates the term 'adenoma', a benign tumor of glandular tissue.
Step-by-step explanation:
The combining form meaning gland is adeno-. When you put this together with the suffix referring to a tumor, which is -oma, you create the term for a tumor of the glandular tissue, which is adenoma. An adenoma is a benign tumor that arises in or resembles glandular tissue. It's important to note that while adenomas are not cancerous, some can develop into cancer if left untreated.