1) Decameter 2) Dekameter 3) Dekametre 4) Dkm 1) Decameter 2) Dekameter 3) Dekametre 4) Metric linear unit 5) Unit of length 
A decametre or dekametre (American spelling: dekameter, earlier decameter; symbol dam, sometimes Dm or dkm) is a very rarely used unit of length in the metric system, equal to ten metres, the SI base unit of length. It can be written in scientific notation as 1 E+1 m (exponential notation), meaning 10 × 1 m. This measure is included in the SI mos...
• (n.) A measure of length in the metric system; ten meters, equal to about 393.7 inches.
decametre (British)
Abbreviated as dam, unit length equal to 10m. See also: Decimal Prefixes, Metre.