etalon

[ eyt-l-on ]

noun

, Optics.

1. an interferometer consisting of two glass plates that reflect approximately half of each ray of light incident upon them and that are separated by a small, fixed distance: used to compare wavelengths and to study atomic spectra.

etalon

/ ˈɛtəˌlɒn /

noun

1. physics a device used in spectroscopy to measure wavelengths by interference effects produced by multiple reflections between parallel half-silvered glass or quartz plates

Word History and Origins

Origin of etalon¹

1900–05; < French; Middle French estalon standard, derivative of Old French estal place < Germanic; stall ¹

Word History and Origins

Origin of etalon¹

C20: French étalon a fixed standard of weights and measures, from Old French estalon; see also stallion

Example Sentences

The Finnish builder completed the sale of its businesses in Russia to Etalon Group in May 2022.

From Reuters

The Finnish builder completed the sale of its businesses in Russia to Etalon Group in May 2022.

From Reuters

But the man who collected the prize on Chebbi's behalf from soldier-turned-President Ibrahim Traoré, said that winning the Etalon d'or du Yennenga - as the top award is known - "means a lot" to Chebbi.

From BBC

YIT announced in April it would sell its business in the country to Etalon Group.

From Reuters

YIT announced early in April it would sell its business in the country to Etalon Group.

From Reuters