Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun The SI unit for the amount of ionizing radiation required to produce the same biological effect as one rad of high-penetration x-rays, equivalent to a gray for x-rays.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun In 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. Symbol: Sv

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[After Rolf Maximilian Sievert, (1896–1966), Swedish radiologist.]

from Wiktionary, Creative Commons Attribution/Share-Alike License

Named after the Swedish radiologist Rolf Sievert.

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