sievert

[ see-vert ]

/ ˈsi vərt /

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

Nearby words

sieve graft, sieve of eratosthenes, sieve tube, sieve-tube element, sievers, sievert, sieyès, sif, sifaka, sifnos, sift

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. 2019

Examples from the Web for 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

/ (ˈsiːvət) /

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

Medicine definitions for sievert

sievert

[ sē′vərt ]

n.

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.

Science definitions for sievert

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).