Definition from Wiktionary, the free dictionary
milliroentgen (plural milliroentgens or milliroentgen)
- A unit of exposure to ionizing radiation, one thousandth of a roentgen.
2007 November 8, “Radioactive Dumping Is Reported in Congo”, New York Times:
- Mineral residue tested on the bridge and on the banks of the river found levels of radioactivity as high as 10 milliroentgen per hour, about 33 times what Congo considers a tolerable limit.