sievert/ˈsiː.vət/EtymologyBorrowed from Swedish Sievert, ultimately from Old Norse Sigurþór.sievert means A surname. Lexicurio rates it Rare gem — a strength score of 76 out of 100.nameA surname.nounIn the International System of Units, the derived unit of radiation dose: the dose received in one hour at a distance of 1 cm from a point source of 1 mg of radium in a 0.5 mm thick platinum enclosure, which in its biological effects corresponds to several different quantities: equivalent dose, effective dose, and committed dose.