Igama elithi "usuku lwedigri" ngokuvamile libhekisela esilinganisweni sokuthi kungakanani ukushisa noma ukupholisa okudingekayo ukuze kugcinwe izinga lokushisa elithile ngaphakathi kwebhilidi noma esinye isikhala esivalekile. Ngokucacile, izinsuku zamadigri zibalwa ngokukhipha izinga lokushisa eliyireferensi (ngokuvamile lingu-65 degrees Fahrenheit) kusukela ezingeni lokushisa elimaphakathi losuku oluthile, bese kufingqwa lawa manani esikhathini esibekiwe (ngokuvamile inyanga noma unyaka). Inombolo ewumphumela imelela inani elikhulayo lokushisisa noma ukupholisa elidingekayo ukuze kugcinwe izinga lokushisa elikhululekile lasendlini, futhi isetshenziselwa ukulinganisa ukusetshenziswa kwamandla nezindleko.