Acclimatization n. : The act of acclimatizing; the process of inuring to a new climate, or the state of being so inured.

Example:
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Taxonomy
Humans, Plants, Altitude Acclimatization, free encyclopedia, US Army, Altitude physiology, Animals, heat, sweat, Heat Acclimation, altitude, search, organism, adjusting, food availability, stresses, seasonal weather changes, short time.

Defination from the web:
Acclimatization or acclimation is the process of an organism adjusting to change in its environment, allowing it to survive changes in ... Acclimatization occurs in a short time, (days to weeks) and within one organism's lifetime (compare adaptation) ...