What does the prefix "micro" signify?

The prefix "micro" denotes a small or minute quantity, representing a factor of 10^-6, or one millionth of a unit in the metric system. This terminology is widely used across various scientific and engineering disciplines to indicate small measurements. For instance, in biology, a micrometer (or micron) is often used to measure cells and microorganisms, which can be incredibly tiny. In the context of physics, a microvolt is one-millionth of a volt, illustrating how "micro" effectively conveys the concept of smallness in technical terms. Understanding this prefix helps in accurately interpreting measurements and scales in scientific discussions.