'Habituation' definitions:

Definition of 'habituation'

(from WordNet)
noun
Being abnormally tolerant to and dependent on something that is psychologically or physically habit-forming (especially alcohol or narcotic drugs) [syn: addiction, dependence, dependance, dependency, habituation]
noun
A general accommodation to unchanging environmental conditions

Definition of 'Habituation'

From: GCIDE
  • Habituation \Ha*bit`u*a"tion\ (h[.a]*b[i^]t"[-u]*[=a]"sh[u^]n), n. [Cf. F. habituation.] The act of habituating, or accustoming; the state of being habituated. [1913 Webster]

Synonyms of 'habituation'

From: Moby Thesaurus