autoantibody

noun

au·​to·​an·​ti·​body ˌȯ-(ˌ)tō-ˈan-ti-ˌbä-dē How to pronounce autoantibody (audio)
: an antibody active against a tissue constituent of the individual producing it

Examples of autoantibody in a Sentence

Recent Examples on the Web
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This includes the child’s age and other factors like the presence of proteins called islet autoantibodies in the bloodstream. Dr. Brittany Bruggeman, Boston Herald, 16 Nov. 2025 This chronic inflammation may be caused by lingering traces of virus in the body or by misdirected antibodies, known as autoantibodies, that attack a person’s own cells and tissues. Emily Mullin, Wired News, 14 Nov. 2025 There would also need to be a system to remind families to get their child checked for autoantibodies at certain intervals. Rachel Nuwer, Scientific American, 14 Oct. 2025 The team noted that further analyses were unable to identify any characteristic at the start of the trial that predicted treatment response, including age, specific immune system genes known as human leukocyte antigens (HLA), body mass index (BMI) or number of autoantibodies. Hannah Millington, MSNBC Newsweek, 18 Sep. 2025 See All Example Sentences for autoantibody

Word History

Etymology

auto- + antibody

First Known Use

1905, in the meaning defined above

Time Traveler
The first known use of autoantibody was in 1905

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Cite this Entry

“Autoantibody.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/autoantibody. Accessed 28 Jan. 2026.

Medical Definition

autoantibody

noun
au·​to·​an·​ti·​body ˌȯt-(ˌ)ō-ˈant-i-ˌbäd-ē How to pronounce autoantibody (audio)
plural autoantibodies
: an antibody active against a tissue constituent of the individual producing it

More from Merriam-Webster on autoantibody

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