The prefix 'ADEN' is often used to refer to a GLAND. The term 'ADEN' comes from the Greek word for 'GLAND'. An example of this is the adenoids, which are a pair of lymphatic glands located in the throat. Another example is the adenohypophysis, which is the anterior lobe of the pituitary GLAND. The suffix '-o' is often used to refer to a cell or tissue. Therefore, the term 'adeno' can be used to refer to a glandular cell or tissue.