dark background
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Against a Dark Background — infobox Book | name = Against a Dark Background orig title = translator = image caption = author = Iain M. Banks cover artist = country = Scotland language = English series = genre = Science fiction novel publisher = Orbit Books release date =… … Wikipedia
Dark field microscopy — (dark ground microscopy) describes microscopy methods, in both light and electron microscopy, which exclude the unscattered beam from the image. As a result, the field around the specimen (i.e. where there is no specimen to scatter the beam) is… … Wikipedia
dark-fieldmicroscope — dark field microscope (därkʹfēld ) n. A microscope in which an object is illuminated only from the sides so that it appears bright against a dark background. * * * … Universalium
dark-field illumination — [därk′fēld′] n. the illumination of the field of a microscope by directing a beam of light from the side so that the specimen is seen against a dark background * * * … Universalium
dark-field illumination — [därk′fēld′] n. the illumination of the field of a microscope by directing a beam of light from the side so that the specimen is seen against a dark background … English World dictionary
dark-ground illumination — noun (biology) A method for the microscopic examination of living material by scattered light, specimens appearing luminous against a dark background (cf ↑bright field illumination) • • • Main Entry: ↑dark … Useful english dictionary
dark-field — dark′ field adj. opt of or pertaining to the illumination of an object by which it is seen, through a microscope, as bright against a dark background • Etymology: 1860–65 … From formal English to slang
dark-field illumination — «DAHRK FEELD», a system of illumination, used especially in an ultramicroscope, lighting the field from the side, making a light object on a dark background … Useful english dictionary
background — noun 1 type of family, social class, etc. sb comes from ADJECTIVE ▪ family ▪ Can you tell me something about your family background? ▪ broad ▪ It is important to have a broad educational background. ▪ … Collocations dictionary
background — n. one s experience, past 1) to check smb. s background 2) a broad; narrow; rich; specialized background 3) one s academic, educational; cultural; religious background 4) a background for (to have the right background for a job) rear part of a… … Combinatory dictionary
Dark-field microscope — A dark field microscope is a type of microscope in which objects are illuminated at a very low angle from the side so that the background appears dark and the objects show up against this dark background. External links *… … Wikipedia
