|the estimation of something as valueless (encountered mainly as an example of one of the longest words in the English language).|
|(used as a nonsense word by children to express approval or to represent the longest word in English.)|
autoantibody au·to·an·ti·bod·y (ô'tō-ān'tĭ-bŏd'ē)
An antibody that attacks the cells and tissues of the organism in which it was formed.
harmful antibody that attacks components of the body called self antigens. Normally autoantibodies are routinely eliminated by the immune system's self-regulatory process-probably through the neutralization of autoantibody-producing lymphocytes before they mature. At times this process fails, and antibodies that react to self constituents proliferate.
Learn more about autoantibody with a free trial on Britannica.com.