SINCE 1828

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transmissometer

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noun trans·mis·som·e·ter \ˌtran(t)s-(ˌ)mi-ˈsä-mə-tər, ˌtranz-\

Definition of transmissometer

: an instrument for measuring the transmission of light through a fluid (such as the atmosphere)

Circa 1931

First Known Use of transmissometer

circa 1931

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