counteradaptation
noun
                                                                                                                            
                                                            coun·ter·ad·ap·ta·tion
                    
                                                                                                              
                                                                                                                                  ˌkau̇n-tər-ˌa-ˌdap-ˈtā-shən  
                                                                                                                              
            -dəp-
                                                      
                                                          
            variants  
 or counter-adaptation
        
    
            
               plural counteradaptations or counter-adaptations            
        
    1
                    
                                          
              
          
                                                      : adaptation of an organism (as in modification of behavior, physiology, or form) in response to an adaptation of another organism with which it regularly interacts                                      
              
                             
counteradaptation of insect pests in response to novel defensive chemicals produced by plant hosts
                         
                
                                
            also                
          
                                                      : a favorable trait that arises as a result of counteradaptation                                       
              
                             
            counteradaptations serving as a selective force to future change    
                         
            2
                    
                                          
              
          
                                                      : opposition to the effect of a drug or stimulus that is hypothesized to develop in an organism as a mechanism to maintain homeostasis                                      
                
                    
                                                      counteradaptive
                        
                                      adjective
                                                                                                      
                        
                        
      
 or counter-adaptive
                                                                                        
          
         
                        counteradaptive processes    
  
                  
          
         
                        counteradaptive coevolution    
  
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  Merriam-Webster unabridged




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