Dcash is not only the name of this site and associated organization, which is planning to create and maintain digital cash services. Dcash also, not surprisingly, stands for Digital Cash.
Dcash is commonly called ecash (electronic cash). However, I believe the term dcash is more appropriate, since what we are talking about is the digital equivalent of cash. Like regular cash, dcash is a form of money which allows anonymous transactions. As opposed to physical cash, in the form of a banknotes or coins, a digital coin is represented by a code (typically an encrypted message written in ASCII, stored as a list of binary digits in computer memory). However, the name ‘electronic cash’ is too narrow. Digital codes need not be stored and transported using electricity. Although typically digital money will be stored and transferred by computers and wires, i.e. electronically, this need to be so. For example, digital cash can be stored on a CD or memory card, where it resides without any electricity flowing (although electricity is required to read from or write to such devices). And, of course, a digital coin can simply be written down on a piece of paper, in which case it closely resembles a cash banknote with a very long unique (and secret) serial number.