The prefix "centi-" is a metric prefix meaning one hundredth (1/100) of a unit. It is used to denote a value that is 0.01 times the base unit. For example:
- 1 centimeter (cm) is one hundredth of a meter.
- 1 centiliter (cL) is one hundredth of a liter.
- 1 centigram (cg) is one hundredth of a gram.
So, "centi" measures a fraction (1/100) of various metric units.