Symbols:D/Dekametre

Dekametre

 * $\mathrm {dam}$

The symbol for the dekametre is $\mathrm {dam}$:
 * $\mathrm {da}$ for deka
 * $\mathrm m$ for metre.

Also defined as
Some older sources give it as $\mathrm {Dm.}$

The $.$ is part of the symbol.