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单词 etalon
释义

etalon

noun

eta·​lon
ˈātᵊlˌän,
ˈet-
plural -s
: an interferometer in which two parallel partially silvered glass plates at a fixed distance apart produce by multiple reflection interference spectra of high dispersion and resolution adapted to the fine-structure analysis of spectrum lines

Word History

Etymology

French étalon standard of weights and measures, from Middle French estalon, estelon, probably of Germanic origin; akin to Frisian stal shape, form

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更新时间:2024/12/23 18:50:31