What is the combining form for gland?

The combining form for "gland" is aden/o. This term is derived from the Greek word "aden," which refers specifically to glands in the body. Glands are specialized organs that secrete substances such as hormones, enzymes, or other fluids, and understanding the terminology is essential in medical contexts where glandular function is discussed.

The other options do not accurately represent the combining form for "gland." The combining form gland/o is incorrect, as it is not a standard medical term used in the field. Glandin/o is also not recognized within medical terminology, and duct/o refers to ducts, which are pathways that transport secretions but do not denote the gland itself. Therefore, aden/o is the correct term to use when referring to glands in a medical terminology context.