The term VACCINATION SITE can be broken down into two parts: ARM (3 letters). ARM is an acronym for the medical term 'Administration of Rabies Vaccine and Management of Exposure'. This term refers to the location where a person can receive a rabies vaccine, such as a doctor's office or a hospital. The other part of the term, VACCINATION SITE, refers to the specific place where the vaccine is administered. This could include a clinic, pharmacy, or other health care facility.