Which prefix means 'under' in medical terminology?

In medical terminology, the prefix "sub" means "under" or "below." It is commonly used to indicate a position that is lower or beneath another structure. For instance, in the term "subcutaneous," it refers to tissue that is located beneath the skin. Understanding prefixes like "sub" is vital in medical terminology because they help to clarify the location or condition being described, enabling healthcare professionals to communicate more effectively about anatomy and medical conditions.

The other prefixes listed have different meanings: "tetra" refers to four, "cardi" pertains to the heart, and "poly" means many or several. This distinction highlights the importance of prefixes in understanding and forming medical terms accurately.