acclimatize

Concise Oxford English Dictionary © 2008 Oxford University Press:
acclimatize /əˈklʌɪmətʌɪz/ (or acclimatise)

▶verb

• 1 (often acclimatize to or be/become acclimatized to) become accustomed to a new climate or new conditions.

• 2 Biology respond to changes in environmental factors.

• 3 Botany & Horticulture harden off (a plant).

– derivatives
acclimatization noun.

– origin C19: from Fr. acclimater ‘acclimatize’ + -ize.