dark-field illumination

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dark-field illumination

n
(General Physics) illumination of the field of a microscope from the side so that the specimen is viewed against a dark background
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References in periodicals archive ?
The circulating blood cells as seem by dark-ground illumination. American Journal of Clinical Pathology, 1936; 6:423.
Demonstration of typical motility of leptospira under dark-ground illumination in clinical samples, though helpful in early diagnosis, has low sensitivity and depends on the technician's opinion.