The prefix meaning gland is?

• A. Para-
• B. Aden-
• C. Ost-
• D. Proct-

Answer: (B)

Medical prefixes tell you which body part is involved. The combining form aden- comes from the Greek word for gland and is used in terms like adenitis, adenoma, and adenopathy to indicate a relation to a gland. That makes aden- the prefix meaning gland.

The other options point to different structures: para- means beside or near, ost- (or oste-) relates to bone, and proct- relates to the rectum. So aden- is the match for gland.