[ mil-uh-rent-guh n, -juh n, -ruhnt- ]
/ ˈmɪl əˌrɛnt gən, -dʒən, -ˌrʌnt- /


a unit of radiation equal to one thousandth of a roentgen. Abbreviation: mR, mr

Origin of milliroentgen

1950–55; milli- + roentgen Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Examples from the Web for milliroentgen

  • A one-hour visit to the inner fenced area will result in a whole body exposure of one-half to one milliroentgen.

    Trinity [Atomic test] Site|White Sands Missile Range Public Affairs Office