Identify the prefix that means "beyond".

The prefix "meta-" signifies "beyond" or "after." It is commonly used in various contexts, particularly in medical terminology and other scientific fields, to denote something that goes beyond a certain limit or level. For example, the term "metastasis" refers to the process by which cancer spreads beyond its original site, indicating movement to a different location in the body. This prefix helps convey the idea of a transition or progression beyond an initial state, making it an essential component in understanding various medical terminologies and concepts.

The other prefixes do not convey the meaning of "beyond." "Dys-" typically relates to difficulty or abnormality, "hetero-" implies difference or diversity, and "eu-" indicates something good or normal. Thus, "meta-" is distinct in its indication of going beyond, making it the correct choice.