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immersion objective
noun
, Optics.
- a microscope objective of high resolving power in which the space between the front lens and the cover glass is filled with an oil whose index of refraction is close to that of the objective and the cover glass.
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Example Sentences
The Abb condenser and the oil-immersion objective are practically always used in the microscopic study of bacteria (Fig. 138).
From Project Gutenberg
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