What does the prefix ultra- mean?

The prefix "ultra-" signifies the concept of being "beyond" or "exceeding" a certain limit or standard. It is derived from Latin, where it conveys an idea of surpassing or going beyond what is usual or expected. In medical terminology, this prefix is often used to describe conditions, measurements, or categorizations that go beyond normal ranges or limits. For instance, in contexts like "ultrasonography," it refers to sound waves that are beyond the audible range for humans. This understanding of the prefix helps clarify its use in various medical terms and enhances comprehension of their meanings within the field.