noun
sievert; Sv
SI unit of equivalent dose of ionizing radiation, used in physics and radiation protection.
この地域の年間放射線量は約2.4ミリシーベルトです。
The annual radiation dose in this area is about 2.4 millisieverts.
グレイ (gray) measures absorbed dose, while シーベルト measures equivalent dose, accounting for biological effect.
ベクレル (becquerel) measures radioactivity (decays per second), while シーベルト measures radiation dose impact on living tissue.
From English 'sievert', named after Swedish medical physicist Rolf Maximilian Sievert.