lˌɒn noun Optics.
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.
Origin:
1900–05; < French; Middle French estalon standard, derivative of Old French estal place < Germanic; see stall1
1900–05; < French; Middle French estalon standard, derivative of Old French estal place < Germanic; see stall1
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Based on the Random House Dictionary, © Random House, Inc. 2013.
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Link To etalon
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World English Dictionary
etalon (ˈɛtəˌlɒn) ![[Click for IPA pronunciation guide]](http://static.sfdict.com/dictstatic/g/d/dictionary_questionbutton_default.gif) | |
| —n | |
| physics a device used in spectroscopy to measure wavelengths by interference effects produced by multiple reflections between parallel half-silvered glass or quartz plates | |
| [C20: French étalon a fixed standard of weights and measures, from Old French estalon; see also | |
Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
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Etalon
is always a great word to know.
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| an extraordinary or unusual thing, person, or event; an exceptional example or instance. |
| a chattering or flighty, light-headed person. |
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