sievert

[see-vert]

noun Physics.

the standard unit in the International System of Units (SI) of dose equivalent having the same biological effect as one joule of x-rays per kilogram of recipient mass (or one gray): The average person receives about 2 to 3 one-thousandths of a sievert per year from naturally occurring radiation in the environment. Abbreviation: Sv

Compare gray², rem.

Origin of sievert

named in honor of Swedish radiologist Rolf Maximilian Sievert (1896–1966)

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for sievert

Historical Examples of sievert

Sievert Nielsen, whom I have mentioned elsewhere, was the fourth of my men.
Tales of lonely trails
Zane Grey
Compressed air or steam is also used for fashioning very large vessels, baths, dishes and reservoirs by the “Sievert” process.
Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 1
Various

British Dictionary definitions for sievert

sievert

noun

the derived SI unit of dose equivalent, equal to 1 joule per kilogram. 1 sievert is equivalent to 100 remsSymbol: Sv
(formerly) a unit of gamma radiation dose approximately equal to 8.4 × 10 –2 gray

Word Origin for sievert

C20: named after Rolf Sievert (1896–1966), Swedish physicist

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

sievert in Medicine

sievert

[sē′vərt]

A unit of ionizing radiation absorbed dose equivalent in the International System of Units, obtained as a product of the absorbed dose measure in grays and a dimensionless factor, stipulated by the International Commission on Radiological Protection, and indicating the biological effectiveness of the radiation.

sievert in Science

sievert

[sē′vərt]

The SI derived unit used to measure the amount of radiation necessary to produce the same effect on living tissue as one gray of high-penetration x-rays. The sievert is named after Swedish physicist Rolf Sievert (1896-1966).