What does 'sub' mean in medical terms?

In medical terminology, the prefix "sub" is derived from Latin, meaning "under" or "below." This prefix is commonly used in various medical terms to indicate a position that is lower than or beneath something else. For instance, "subcutaneous" refers to the layer of tissue beneath the skin, while "subnormal" denotes a value or condition that is less than the standard expected levels.

The understanding of prefixes like "sub" is crucial in medical contexts, as it aids in deciphering the meaning of complex terms and ensures clear communication among healthcare professionals. It emphasizes the importance of language structure in effectively describing locations, conditions, and processes within the body.