Definition of sievert
: an SI unit for the dosage of ionizing radiation equal to 100 rems
Recent Examples of sievert from the Web
The robot used Wednesday was designed to tolerate radiation of up to 200 sieverts — a level that can kill humans instantly.
The previous high in the reactor was 73 sieverts recorded in 2012, reports The Japan Times.
One sievert—the international measurement of radiation exposure—is enough to cause radiation sickness, infertility and cataracts.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'sievert'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
Origin and Etymology of sievert
Rolf Maximilian Sievert †1966 Swedish radiologist
First Known Use: 1945See Words from the same year
Medical Definition of sievert
: an SI unit for the dosage of ionizing radiation equal to 100 rems—abbreviation Sv
Biographical Note for sievert
Rolf Maximilian (1896–1966), Swedish physicist. Sievert was a pioneer in radiation physics and protection from radiation. He served as head of the physics laboratory at Sweden's Radiumhemmet from 1924 to 1937, when he became head of the department of radiation physics at the Karolinska Institute. He played a pioneering role in the measurement of doses of radiation especially in its use in the diagnosis and treatment of cancer. In later years he focused his research on the biological effects of repeated exposure to low doses of radiation. In 1964 he founded the International Radiation Protection Association, serving for a time as its chairman. He also chaired the United Nations Scientific Committee on the Effects of Atomic Radiation. In 1979 a scientific conference named a unit for the dosage of ionizing radiation in his honor.
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Britannica.com: Encyclopedia article about sievert
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