Habituation

n.

1.

The act of habituating, or accustoming; the state of being habituated.

Noun	1.	habituation - being abnormally tolerant to and dependent on something that is psychologically or physically habit-forming (especially alcohol or narcotic drugs) Synonyms: addiction, dependence, dependency
	2.	habituation - a general accommodation to unchanging environmental conditions

a habit, acclimation, acclimatization, accommodation, accustoming, acquired tolerance, acute alcoholism, adaption, addictedness, addiction, adjustment, alcoholism, amphetamine withdrawal symptoms, barbiturate addiction, barbiturism, breaking, breaking-in, case hardening, chain smoking, chronic alcoholism, cocainism, conditioning, crash, craving, dependence, dipsomania, domestication, drug addiction, drug culture, drug dependence, familiarization, hardening, housebreaking, inurement, naturalization, nicotine addiction, orientation, physical dependence, psychological dependence, seasoning, taming, tolerance, training, withdrawal sickness, withdrawal symptoms