What does the prefix "auto-" denote?

The prefix "auto-" means "self." It is derived from the Greek word "autós," which also translates to "self." This prefix is commonly used in medical terminology to indicate processes, functions, or conditions that originate from the individual or are self-initiated. For example, in terms like "autonomous," it refers to something that acts independently, while "autoinflammatory" pertains to inflammation that occurs as part of the body’s own immune response.

The other choices do not align with the meaning of "auto-." For instance, "different from usual" does not relate to self-activity or self-originating processes. "Slow" refers to a rate of action, while "before" indicates a position in time but does not imply self. Understanding the specific meaning of the prefix "auto-" is crucial for accurately interpreting medical terms that involve self-related functions or actions.