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dark-field

[ dahrk-feeld ]
/ ˈdɑrkˌfild /
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adjective Optics.
of or relating to the illumination of an object by which it is seen, through a microscope, as bright against a dark background.
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Origin of dark-field

First recorded in 1860–65
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

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