Definition: In geography, "acclimatisation" refers to the gradual adjustment of an organism from its native environment or habitat to a new one that is more conducive to survival and reproduction. The term originates from the idea that organisms adapt to their surroundings by changing physical traits such as body size and shape, behavior patterns, and reproductive strategies. This process is called acclimatization or adaptation and it can be broadly defined as any change in an organism's environment or living conditions that results in changes in its ability to thrive and reproduce. Acclimatisation occurs gradually over time as the organism adjusts to the new surroundings while simultaneously adapting its physical characteristics to better fit its new environment. This process is crucial for survival, allowing organisms to survive and reproduce in a way that is advantageous to their species or environment. Some examples of organisms that have undergone acclimatization include birds that migrate across continents due to changes in their environment and climate, and some reptiles that adjust their habitats or body shape to better fit the requirements of new environments.

acclimatised