acclimation

noun

ac·​cli·​ma·​tion ˌa-klə-ˈmā-shən 

-ˌklī-

: the process or result of acclimating

especially : physiological adjustment by an organism to environmental change

Synonyms

• adjustment
• adaptation
• adaption

Examples of acclimation in a Sentence

a period of acclimation to the region's rising temperatures

Recent Examples on the Web

This could mean that three 90-minute yoga sessions a week aren’t enough to prompt heat acclimation. —Lauren Leffer, Popular Science, 4 Sep. 2025

Fifty of these small mammals were released on July 30, according to the trusts, and videos from other releases in the region captured their speedy acclimation back to their natural environment. —Irene Wright, Miami Herald, 4 Sep. 2025

It’s been hard to call the top prospect’s acclimation to the big leagues smooth. —Fabian Ardaya, New York Times, 25 Aug. 2025

So much can slip through the cracks during this acclimation period, and parents need something to help alleviate anxiety, not add to the plate. —Devonne Goode, Parents, 20 Aug. 2025

Word History

Etymology

acclim(ate) + -ation

First Known Use

1801, in the meaning defined above

Rhymes for acclimation

• abdication
• aberration
• abjuration
• abnegation
• abrogation
• acceptation
• acclamation
• accusation
• activation
• actuation
• acylation
• adaptation

Medical Definition

acclimation

noun

ac·​cli·​ma·​tion ˌak-lə-ˈmā-shən, -ˌlī- 

: acclimatization especially by physiological adjustment of an organism to environmental change