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telephotometer

American  
[tel-uh-foh-tom-i-ter] / ˌtɛl ə foʊˈtɒm ɪ tər /

noun

  1. an instrument for measuring the amount of light emanating from a distant object.


Etymology

Origin of telephotometer

First recorded in 1925–30; tele- 1 + photometer

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