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1. The lens or lenses in the object end of the body tube of a microscope, by means of which the rays coming from the object examined are brought to a focus. SYN: object glass. 2. Viewing events or phenomena as they exist in the external world, impersonally, or in an unprejudiced way; open to observation by oneself and by others. Cf.:subjective. [L. ob- jicio, pp. -jectus, to throw before]
- achromatic o. an o. that is corrected for two colors chromatically, and one color spherically.
- apochromatic o. an o. in which chromatic aberration is corrected for three colors and spherical aberration is corrected for two.
- immersion o. a high power o. used with a drop of oil between the lens and the specimen on the slide, allowing a greater numerical aperture; similar lenses are available for use with water as the immersing liquid.
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ob·jec·tive əb-'jek-tiv, äb- adj
1) of, relating to, or being an object, phenomenon, or condition in the realm of sensible experience independent of individual thought and perceptible by all observers <\objective reality>
2) perceptible to persons other than the affected individual <an \objective symptom of disease> compare SUBJECTIVE (2b)
ob·jec·tive·ly adv
objective n
1) a lens or system of lenses that forms an image of an object
2) something toward which effort is directed
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n.
(in microscopy) the lens or system of lenses in a light microscope that is nearest to the object under examination and furthest from the eyepiece. In many types of microscope interchangeable objectives with different powers of magnification are provided.
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ob·jec·tive (ob-jekґtiv) [L. objectivus] 1. perceptible to the external senses. 2. a result for whose achievement an effort is made. 3. the lens or system of lenses in a microscope (or telescope) that is nearest to the object under examination.Medical dictionary. 2011.