Examples of sievert in a Sentence
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One sievert equals 1 joule per kilogram weighted for the biological effectiveness of the radiation and the tissues exposed.
—
IEEE Spectrum, 6 Mar. 2026
Photo by Chandan Khanna / AFP via Getty Images
Heading to Mars
NASA’s own calculations show that longer missions to Mars could take astronauts above 1 sievert of radiation exposure, which is above the agency’s acceptable limit for lifetime exposure.
—Georgina Torbet, The Verge, 16 Aug. 2024
The sievert, by comparison, is the unit that quantifies the biological effect that a dose of radiation has on the body.
—Monique Brouillette, Popular Mechanics, 28 Aug. 2023
The sievert is a unit that measures the amount of radiation absorbed by a person—while accounting for the type of radiation and its impact on particular organs and tissues in the body—and is equivalent to one joule of energy per kilogram of mass.
—Ramin Skibba, Scientific American, 14 July 2021
The unit of measurement for the impact of ionizing radiation on a person’s health is called a sievert.
—Carolyn Kormann, The New Yorker, 22 Dec. 2019
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IEEE Spectrum, 6 Mar. 2026
Photo by Chandan Khanna / AFP via Getty Images
Heading to Mars
NASA’s own calculations show that longer missions to Mars could take astronauts above 1 sievert of radiation exposure, which is above the agency’s acceptable limit for lifetime exposure.
—Georgina Torbet, The Verge, 16 Aug. 2024
The sievert, by comparison, is the unit that quantifies the biological effect that a dose of radiation has on the body.
—Monique Brouillette, Popular Mechanics, 28 Aug. 2023
The sievert is a unit that measures the amount of radiation absorbed by a person—while accounting for the type of radiation and its impact on particular organs and tissues in the body—and is equivalent to one joule of energy per kilogram of mass.
—Ramin Skibba, Scientific American, 14 July 2021
The unit of measurement for the impact of ionizing radiation on a person’s health is called a sievert.
—Carolyn Kormann, The New Yorker, 22 Dec. 2019
Cite this Entry
“Sievert.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/sievert. Accessed 29 Mar. 2026.
Copy CitationMedical Definition
sievert
noun
sie·vert
ˈsē-vərt 
: an SI unit for the dosage of ionizing radiation equal to 100 rems
—abbreviation Sv
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