dilutedilute phasedilutiondimensiondimensionlessdimerdimerizationdiolendioxandioxanedioxidedioxindioxopurinediperse phasediphenyldiphenyl ketonediphenylethylenediphosgenedipolar iondipoledipole dipole bonddipole dipole couplingdipole dipole forcesdipole interactiondipole momentdippingdipping methodediproticdiprotic aciddirac equationdirect absorption processdirect currentdirect dyedirect potentiometric measurementdirect potentiometric methoddirect reading instrumentdirective effect of functional groupsdisaccharidedisc integratordiscontinuous phasediscretediscrete packetsdiscrete valuesdisintegrationdislocationdislocation defectdisorderdispergationdisperse dyedisperse system