au·to·immune \¦ ̷ ̷ ̷ ̷ ˌ\adjective Etymology: back-formation from autoimmunization : of, relating to, or caused by antibodies or T cells that attack molecules, cells, or tissues of the organism producing them < autoimmune diseases > • au·to·immunity\"ˌ\noun • au·to·immunize\"ˌ\transitive verb