What prefix refers to something being located within?

The prefix that refers to something being located within is "intra-." This prefix is derived from Latin, meaning "inside" or "within." It is commonly used in medical terminology to describe functions, locations, or conditions that occur internally. For example, in anatomy, "intracranial" pertains to something occurring within the skull, indicating that it is situated inside a particular boundary.

In contrast, "inter-" typically refers to something occurring between or among multiple entities, such as in "intercellular," which describes activities or processes between cells. "Extra-" denotes something that is outside of or beyond, as in "extracorporeal," meaning outside the body. Lastly, "sub-" signifies something that is beneath or below, such as in "subcutaneous," which refers to something located under the skin. Understanding these distinctions helps clarify the precise meanings associated with various medical terms.