Centi
In the metric system, "centi" is a prefix: it is not a measurement unit of any kind.
Kilo- is the unit of the metric system that represents 1000 times the base unit.
Every prefix in the metric system denotes a power of 10.
The metric prefix for 10 is deka-. This is similar (but different) from the metric prefix for 1/10 which is deci-
The prefix for ½ÂÎÁ in the metric system is deci-. So, ½ÂÎÁ is equal to 0.1 in the base unit.
The prefix "deci-" is used to express fractions in the metric system, representing one-tenth of the base unit.
The metric prefix deci- represents a factor of 0.1, which means one-tenth or 1/10 of the base unit. It is often used in the metric system to denote a fraction of a unit.
The metric system prefix for the quantity 0.001 is Milli.
A metric prefix or SI prefix is a unit prefix that precedes a basic unit of measure to indicate a decadic multiple or fraction of the unit. The various prefix unit are kilo , hecto,deca,deci.
"Centi" as in centimetre.
If, by 'metric system', you mean the 'SI system', then there is no base unit for volume. The unit for volume is called a 'derived unit', and it is the cubic metre (m3).
The base unit for length is the metre.