Which prefix is related to something being located outside?

The prefix "Exo-" signifies something that is located outside or external to a particular structure or organism. It derives from the Greek word "ἐκτός," meaning "outside" or "external." This prefix is commonly used in various scientific and medical terms to indicate an external origin or location, such as in "exoskeleton" (an external skeleton) or "exothermic" (a reaction that releases heat to the outside environment).

In contrast, the other prefixes represent different concepts: "Glyc-" pertains to sugar, "Intra-" denotes something within or inside, and "Hypo-" refers to a condition that is below normal or deficient. Understanding these prefixes helps in interpreting terms across different fields, especially in biology and medicine, where precise language is key to conveying accurate information.