acclimation(n = noun.process) acclimatisation, acclimatization - adaptation to a new climate (a new temperature or altitude or environment);
is a kind of adaptation, adaption, adjustment
Derived form verb acclimate₁

   The process of becoming, or the state of being, acclimated, or habituated to a new climate; acclimatization. [1913 Webster]

acclimation, n. acclimatization.

Etymology:
irreg. f. ACCLIMATE