What is the meaning of the morpheme aden?

• A. Market place
• B. Fat
• C. Gland
• D. Hear

Answer: (C)

Aden means gland. In medical terminology, adeno- (or aden-) is a combining form that denotes a relation to glands. It shows up in terms like adenitis (inflammation of a gland), adenoma (a glandular tumor), and adenopathy (disease or enlargement of glands). That gland association is why this morpheme is the correct choice. By contrast, words about a market place, fat, or hearing use different roots (for example, agor- or agora for market, lip- or adip- for fat, and audit- or acoust- for hearing).