Prefix
deca- or deka-
Etymology
- Greek deka, ten.
In the International System of Units and other metric systems of units, multiplying the unit to which it is attached by 10. Symbol: da
- Usage notes: The official form of this prefix is deka-, but deca- is more commonly used. This prefix is not used in official scientific contexts. For example, "1 dam" (one decametre or dekametre) is written instead as either "10 m" or "0.01 km".
