Dictionary.com
definitions
  • synonyms

etalon

[eyt-l-on]
See more synonyms for etalon on Thesaurus.com
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.
Show More

Origin of etalon

1900–05; < French; Middle French estalon standard, derivative of Old French estal place < Germanic; see stall1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for etalon

etalon

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
Show More

Word Origin

C20: French étalon a fixed standard of weights and measures, from Old French estalon; see also stallion
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012