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.
The base unit for length is the metre.
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).