Topic summary
Picometer
Extracted from the Wikipedia article Picometre.
The picometre (international spelling as used by the International Bureau of Weights and Measures; SI symbol: pm) or picometer (American spelling) is a unit of length in the International System of Units (SI), equal to 10 m, or one trillionth (1/1000000000000) of a metre, which is the SI base unit of length.