Geiger

Part of speech: noun

Definitions

1. An instrument designed to detect and measure ionizing radiation, often producing audible clicks or visual indicators
2. A device utilized in the detection of radioactive particles, providing information on their presence and intensity
3. A tool used for measuring radiation levels, commonly employed in scientific research and safety monitoring

Etymology: The name belongs to Hans Geiger, the German physicist who co-developed the instrument in 1928 with Walther Müller. Geiger had worked with Ernest Rutherford in Manchester and built an earlier counter there, and the refined device, which detects individual ionizing particles through a brief electrical pulse in a gas-filled tube, became known as the Geiger counter. English took the word directly from German, where "Geiger" is the same surname, so the term is a person's name turned into a generic noun for the instrument. The name itself is an ordinary German surname, and it is often pronounced with a hard "g" as in "guy-ger" in English, though the German original is closer to "guy-ger" with a soft initial sound. Hans Geiger's name thus survives in every radiation detector bearing his title, a permanent link between a laboratory bench and the everyday language of safety monitoring.

Synonyms: detector, meter