blackbody

noun
black·body | \ ˈblak-ˈbä-dē \

Definition of blackbody 

: an ideal body or surface that completely absorbs all radiant energy falling upon it with no reflection and that radiates at all frequencies with a spectral energy distribution dependent on its absolute temperature

First Known Use of blackbody

1712, in the meaning defined above

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The first known use of blackbody was in 1712

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