UIgG, also known as IgG antibodies, are proteins found in the blood that are responsible for fighting off infections and diseases. There are several synonyms for the word UIgG, including immunoglobulin G, gamma globulin, and IgG. These terms can be used interchangeably to refer to the same type of antibody, which is produced by the immune system in response to an infection or vaccination. IgG antibodies are an important part of the body's defense against pathogens, and can help to provide immunity against future infections. In summary, UIgG is just one of many terms used to describe this critical component of the immune system.