roentgen

1 of 2

adjective

roent·​gen ˈrent-gən 

ˈrənt-,

-jən,

-shən

: of or relating to X-rays

roentgen examinations

roentgen

2 of 2

noun

: the international unit of x-radiation or gamma radiation equal to the amount of radiation that produces in one cubic centimeter of dry air at 0°C and standard atmospheric pressure ionization of either sign equal to one electrostatic unit of charge

Example Sentences

Recent Examples on the Web

Noun

The roentgen is basically a unit that relates to how much air would be ionized if electrons were freed from their atoms. —Rhett Allain, Wired, 25 June 2021

The units for exposure rates are commonly given in roentgen units per hour, or R/hr. —Rhett Allain, Wired, 25 June 2021

My guess is that this is a type of unit conversion from some units other than roentgen. —Rhett Allain, Wired, 25 June 2021

Word History

Etymology

Adjective

International Scientific Vocabulary, from Wilhelm Röntgen

First Known Use

Adjective

1896, in the meaning defined above

Noun

1922, in the meaning defined above

Phrases Containing roentgen

• roentgen ray

• roentgen ray

Kids Definition

roentgen

noun

roent·​gen

ˈrent-gən,

ˈrənt-,

-jən

: the international unit of measurement for X-rays and gamma rays that is based on their ability to produce charged particles in the air

Medical Definition

roentgen

1 of 2 adjective

roent·​gen

variants also röntgen

ˈrent-gən  ˈrənt-  -jən; ˈren-chən 

ˈrən-

: of, relating to, or using X-rays : x-ray

roentgen examinations

roentgen therapy

roentgen

2 of 2 noun

variants also röntgen

: the international unit of x-radiation or gamma radiation equal to the amount of radiation that produces in one cubic centimeter of dry air at 0°C (32°F) and standard atmospheric pressure ionization of either sign equal to one electrostatic unit of charge

Biographical Definition

Roentgen

biographical name

see röntgen