What does the prefix 'hypo-' signify?

The prefix 'hypo-' is derived from Greek, meaning "under" or "below." In medical terminology, it commonly denotes a condition that is less than normal or deficient. For example, in the term "hypoglycemia," it signifies a level of glucose in the blood that is below normal. This prefix is often used to describe findings or conditions that indicate a deficiency, such as hypothermia (below normal body temperature) or hypoactive (reduced activity). Therefore, associating 'hypo-' with conditions that are below normal is consistent with its usage in medical contexts. Understanding this prefix can help in deciphering various medical terms that describe medical conditions or physiological states.