adaptation is a topic covered in the Taber's Medical Dictionary.

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(ad″ap″tā′shŏn)

[L. adaptare, to adjust]

1. Adjustment of an organism to a change in internal or external conditions or circumstances.
2. Adjustment of the eye to various intensities of light, accomplished by changing the size of the pupil and accompanied by chemical changes occurring in the rods.
3. In psychology, a change in quality, intensity, or distinctness of a sensation that occurs after continuous stimulation of constant intensity.
4. In dentistry, the proper fitting of dentures or bands to the teeth or closeness of a filling to the walls of a cavity.
adaptational (-shŏ-năl), adj.
adaptationally (-lē), adv.

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