Which of the following prefixes means "above"?

The prefix that means "above" is "supra." This prefix is derived from Latin, where it is used in various scientific and medical terminologies to indicate a position that is higher than or superior to something else. For example, in anatomy, "suprarenal" refers to the adrenal glands, which are located above the kidneys.

Understanding prefixes is crucial in the veterinary field, as they provide important context about anatomical locations or conditions. In contrast, the other prefixes listed have different meanings: "infra" means below; "sub" also indicates beneath or below; and "super" generally means above but can also imply superiority rather than just a spatial relationship. Hence, "supra" is the most accurate choice when specifically referring to the concept of being "above."