1) salinity gradient energy 2) salinity energy the energy obtained from salination GRM: n. (1,2) Note: at the interface of fresh and salt water where rivers enter the sea or at the interface of waters of different salinity, osmotic pressure occurs which may be exploited to provide useful energy by the application of suitably arranged semi-permeable membranes, for example, in the form of a closed cylinder. Alternatively, the electrochemical potential at the interface may be exploited to generate electric current directly; salinity (gradient) energy can be converted by the reversal of any of the various desalination schemes that have been developed over the last several decades