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	Powered by Dorland's Medical Dictionary for Healthcare Consumers
	This information is provided by an independent source. Merck & Co., Inc. is not responsible for this content. Please discuss any and all treatment options with your healthcare professional. The manufacturer of a product generally has the most complete information about that product.
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	A |  B |  C |  D |  E |  F |  G |  H |  I |  J |  K |  L |  M |  N |  O |  P |  Q |  R |  S |  T |  U |  V |  W |  X |  Y |  Z   habituation (hә-bich″u-a´shәn)   the gradual adaptation to a stimulus or to the environment.   the extinction of a conditioned reflex by repetition of the conditioned stimulus.   older term denoting sometimes tolerance and other times a psychological dependence resulting from the repeated consumption of a drug, with a desire to continue its use, but with little or no tendency to increase the dose. Copyright 2007. An Elsevier publication. All rights reserved. Click here for important legal information about Dorland's Medical Dictionary.

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