Definition of acclimated
: adapted to a new altitude, climate, environment, or situation
… people can and must become acclimated to extreme weather. It can be a matter of life and death.— Jack Williams Hampsten, well acclimated from training in Colorado all summer, had LeMond on the ropes …— John Krakauer
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Merriam-Webster unabridged
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The first known use of acclimated was in 1822
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