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

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)

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)