etalon
noun
etalon is a noun meaning “An optical device containing parallel mirrors, used as a narrow band filter, often in laser design” (English Wiktionary, September 2026). It is spelled E-T-A-L-O-N, and it appears about once in every 37 million words in written English (wordfreq, 2021 data). The plural of etalon is etalons.
What does etalon mean?
noun
- 1
An optical device containing parallel mirrors, used as a narrow band filter, often in laser design.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Forms of etalon
- etalons plural
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
How common is etalon?
Etalon appears about once in every 37 million words in written English, the 187,122nd most frequent word form in the list.
Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
Where does etalon come from?
Borrowed from French étalon (“measuring gauge, standard”).
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).