The meaning of the prefix "micro-" is best defined as?

The prefix "micro-" is derived from the Greek word "mikros," meaning small or minute. In various scientific and technical contexts, "micro-" is used to denote something that is significantly smaller than the standard unit of measurement. For instance, in the metric system, a micrometer is one-millionth of a meter, illustrating the prefix's application to denote smallness. This understanding is essential in fields such as biology, where "microorganisms" refer to tiny living organisms that can only be seen under a microscope, underscoring the prefix's association with size. Such a foundational knowledge of prefixes aids in deciphering complex terms across different disciplines.