What does the prefix "milli" signify in measurements?

The prefix "milli" signifies a factor of one thousandth, which is represented as 0.001 in decimal form. This prefix is commonly used in various measurements to indicate a division of a unit into a thousand equal parts. For instance, one millimeter is one thousandth of a meter, and one milligram is one thousandth of a gram. Understanding this prefix is essential for interpreting measurements in fields such as science, engineering, and technology, where precision is crucial.

In contrast, the meanings associated with the other choices do not align with the definition of "milli." For example, "ten," "one hundred," and "one million" correspond to different prefixes such as "deci," "hecto," and "mega," respectively, which indicate larger quantities rather than the smaller fractional measurement that "milli" represents. Thus, identifying "milli" correctly as meaning one thousandth is vital for accurately working with measurements in various contexts.