An incorrect symbol for the metric prefix deka- (10), sometimes seen in combinations such as dkg for the dekagram or dkm for the dekameter. The correct symbol is da-
Russ Rowlett (Director), How Many? A Dictionary of Units of Measurement, Center for Mathematics and Science Education University of North Carolina, USA 2005. http://www.unc.edu/~rowlett/units/dictA.html, (Unit of Meas and Covr Factors - Amer) {608}