milliroentgen
/ˈmɪlɪˌrɛntɡən/
noun
- A unit for measuring exposure to X-rays or gamma rays, equal to one thousandth of a roentgen.
- The old X-ray machine gave off about 50 milliroentgens per second.
- Scientists measured the radiation leak in milliroentgens per hour.
- A typical chest X-ray delivers a few milliroentgens of exposure.