[ 'ɛtəlɒn ]
■ noun Physics a device consisting of two reflecting plates, for producing interfering light beams.
Origin
early 20th cent.: from Fr. étalon , lit. 'standard of measurement'.
[ 'ɛtəlɒn ]
■ noun Physics a device consisting of two reflecting plates, for producing interfering light beams.
Origin
early 20th cent.: from Fr. étalon , lit. 'standard of measurement'.
Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004