What does the prefix "hypo-" indicate?

The prefix "hypo-" signifies a condition that is below, under, or deficient in some way. It is commonly used in medical terminology to describe situations where there is a lack of a substance or a decrease in a physiological function. For instance, "hypoglycemia" refers to abnormally low levels of glucose in the blood, indicating a deficiency. This prefix can be found in various medical terms, where it conveys that something is lacking or not at its normal level. Understanding this prefix helps in interpreting many medical conditions and ensuring appropriate communication in the healthcare field.

The other choices reflect different prefixes or concepts that do not align with the meaning of "hypo-". Excessive is often indicated by the prefix "hyper-", while "above" and "near" denote positions that are elevated or proximally close, which also do not accurately represent the meaning of "hypo-".