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etalon

Syllabification: (e·ta·lon)
Pronunciation: /ˈātlˌän/

Definition of etalon

noun

Physics
  • a device consisting of two reflecting plates for producing interfering light beams.

Origin:

early 20th century: from French étalon, literally 'standard of measurement'

etalon in other Oxford dictionaries

Definition of etalon in the British & World English dictionary

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