Definition of Atavism

a tendency to revert back to generational/old behavior, characteristics, or habits

Examples of Atavism in a sentence

Ruby’s red locks were viewed as atavism since her great-grandmother had the red hue.  

Because of her atavism, the smoker eventually started using nicotine again after several months smoke-free.  

Genetic atavism allows for certain traits to pop up in later generations as the family tree continues.  

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