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📏 A radiation unit 🩻 An X-ray photo 🩻 To X-ray
röntgen

röntgen

9.9
A unit for measuring how much X-ray or gamma radiation hits the air
  • noun
  • /ˈrɒntɡən/
  • Archaic
translation icon : röntgen
  • A single röntgen is a relatively large amount of radiation for humans.

Examples

  • Scientists used the röntgen to compare different X-ray machines' outputs.

  • The doctor measured the exposure in röntgen.

  • The technician recorded the patient's exposure in röntgen units.

  • He received 5 röntgens during his treatment.

  • The doctor explained that the safe limit for X-ray exposure is 10 röntgen per hour.

  • After the radiation test, he noted that he had received an exposure of 25 röntgen.

  • The safety guidelines recommend monitoring radiation levels to ensure they do not exceed 5 röntgen in a given period.

Synonyms

R
vsröntgen
  • Archaic
3 9.9

A unit for measuring radiation exposure

is the same unit but represented as a single letter symbol
roentgen
vsröntgen
  • Archaic
2 9.9

A unit for measuring exposure to X-rays or gamma rays

has identical meaning but uses a variant spelling with an umlaut

Surface Forms

röntgen singular
röntgens plural

Etymology

Röntgen is named after the German scientist Wilhelm Röntgen, who discovered 'X-rays', and people later used his name for a unit of radiation. A röntgen measures how much 'X-ray' or 'gamma' radiation is in the air, so the word now means a measure of radiation exposure.