d, l, dl [obsolete] , 3733D-QSAR (three-dimensional quantitative structure–activity relationships), 373 dalton, 373 dark photochemistry (photochemistry without light) [obsolete] , 373 dark reaction (darkness reaction), 374
d, l, dl [obsolete] , 3733D-QSAR (three-dimensional quantitative structure–activity relationships), 373 dalton, 373 dark photochemistry (photochemistry without light) [obsolete] , 373 dark reaction (darkness reaction), 374