Definition: Rabbit is a golf side bet that gets its name from the term used to describe a pacesetter. Someone who runs out ahead of the field in a mile run, for example, is called the rabbit. They are out ahead of the pack, setting the pace.
AIDS. n. A severe immunological disorder caused by the retrovirus HIV, resulting in a defect in cell-mediated immune response that is manifested by increased susceptibility to opportunistic infections and to certain rare cancers, especially Kaposi's sarcoma.
Anti-retroviral therapy (ART) is a treatment for HIV/AIDS. It does not cure the disease; rather, it aims to increase life expectancy, reduce opportunistic infections, and may potentially reduce the likelihood that an infected individual transmits the virus to another. (More on HIV/AIDS).