A unit of radiation dose equal to 0.01 gray or 1 rad. Dose of radiation used in cancer treatments, formerly stated in rads, are generally stated now in centigrays
Russ Rowlett (Director), How Many? A Dictionary of Units of Measurement, Center for Mathematics and Science Education University of North Carolina, USA 2005. http://www.unc.edu/~rowlett/units/dictA.html, (Unit of Meas and Covr Factors - Amer) {608}