The external whole-body exposure dose equivalent at a tissue depth of 1 cm (1000 mg/cm2). For further information, See: Measuring Radiation
U.S. Nuclear Regulatory Commission (NRC), Full-Text Glossary, Washington, DC, USA 2014. http://www.nrc.gov/reading-rm/basic-ref/glossary/f ull-text.html, (Dzstr/ Disabl Mass Care - Amer) {826}