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milliroentgen

American

[mil-uh-rent-guhn, -juhn, -ruhnt-] / ˈmɪl əˌrɛnt gən, -dʒən, -ˌrʌnt- /

noun

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

Etymology

Origin of milliroentgen

1950–55; milli- + roentgen

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.