dark-field

American  

[dahrk-feeld] / ˈdɑrkˌfild /

adjective

Optics.

1. 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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Etymology

Origin of dark-field

First recorded in 1860–65

Example Sentences

Similarly coloured regions correspond to areas with the same crystallographic orientation/thickness. h, Demonstration of the procedure for obtaining dark-field images of the grown seeds.

From Nature • Mar. 14, 2017

Similarly coloured regions correspond to areas with the same crystallographic orientation/thickness. h, Demonstration of the procedure for obtaining dark-field images of the grown seeds.

From Nature • Mar. 14, 2017

Substantial scattering can thus be expected to occur from the nanoantennas, as confirmed by the dark-field optical images shown in .

From Nature • Dec. 11, 2012

Nowadays our first effort after studying the appearance of the suspected lesion is to try to find the germs, with the dark-field microscope or a stain.

From The Third Great Plague A Discussion of Syphilis for Everyday People by Stokes, John H. (John Hinchman)

While they can often be recognized on sight by a physician, it is sometimes necessary to examine them with a dark-field microscope to prove their character by finding the germs.

From The Third Great Plague A Discussion of Syphilis for Everyday People by Stokes, John H. (John Hinchman)