Definition(s)
- 1: The act or process of adapting: the state of being adapted (his ingenious adaptation of the electric cautery knife to...surgery -- George Blumer).
2: Adjustment to environmental conditions: as a) adjustment of a sense organ to the intensity or quality of stimulation b) modification of an organism or its parts that makes it more fit for existence under the conditions of its environment.
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Definition from: Merriam-Webster's Medical Dictionary
by Merriam-Webster Inc.
See also Understanding Medical Terminology.