acclimatization
(ă-klī‵măt-ĭ-zā'shŏn 
)
a. to heat The adjustment of an organism to high environmental temperature. Exposure to high environmental temperature requires a period of adjustment for the body to function efficiently. The amount of time required depends on the temperature, humidity, and duration of daily exposure. Significant physiological adjustments occur in 5 days and are completed within 2 weeks to a month.
acclimatize(ă-klī'mă-tīz‵ )