hemorrhoid
noun
                                                                                                                            
                                                            hem·or·rhoid
                    
                                                                                                              
                                                                                                                                  ˈhem-ˌrȯid  ˈhe-mə-
                                                                                                                                  ˈhe-mə-  
                                                      
                                                          
            
                                
              
          
                                                      : an abnormal mass of dilated and engorged blood vessels in swollen tissue that occurs internally in the anal canal or externally around the anus, that may be marked by bleeding, pain, or itching, and that when occurring internally often protrude through the outer sphincter of the anus and when occurring externally may lead to thrombosis                                      
                
                  —usually used in plural
    
                
called also piles
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  Merriam-Webster unabridged




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