Medical Dictionary

habituation

noun ha·bit·u·a·tion \-ˌbich-ə-ˈwā-shən\

Medical Definition of HABITUATION

1
:  the act or process of making habitual or accustomed
2
a :  tolerance to the effects of a drug acquired through continued use b :  psychological dependence on a drug after a period of use—compare addiction
3
:  a form of nonassociative learning characterized by a decrease in responsiveness upon repeated exposure to a stimulus—compare sensitization 3

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