A vivisector is typically defined as a person who performs experiments on live animals, often in a laboratory setting. However, there are several synonyms that can be used to describe this type of person. These include animal experimenter, animal researcher, and laboratory testing professional. Other synonyms for vivisector might include animal tester, animal investigator, and animal experimenter. Regardless of what term is used, the underlying concept remains the same - the person in question is engaged in the practice of using animals for scientific research and experimentation. While some may argue that this is a necessary part of scientific progress, others are vehemently opposed to it and believe that it is cruel and unnecessary.