Definition of habituation
1
: the process of habituating : the state of being habituated
2a
: 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
: decrease in responsiveness upon repeated exposure to a stimulus
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Merriam-Webster unabridged
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Time Traveler for habituation
The first known use of habituation was in the 15th century
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