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 Nath’s team found low levels of autoantibodies in only one person with ME/CFS. Kamal Nahas, Scientific American, 21 Feb. 2024 Past studies have also pointed to an overactive immune response: a condition called autoimmunity, whereby other immune cells mistakenly attack healthy tissue, often by producing autoantibodies that target the body’s proteins. Kamal Nahas, Scientific American, 21 Feb. 2024 The samples from patients with autoimmune disease produced higher levels of autoantibodies in reaction to proteins associated with Xist, the researchers found. Katie Hunt, CNN, 9 Feb. 2024 Some of these autoantibody responses were largely disease-specific while others were shared across all three conditions. Jonathan Wosen Reprints, STAT, 1 Feb. 2024 Our recent research indicates that one type of autoantibody called antinuclear antibodies increased nearly 50 percent in the U.S. in less than 30 years. Olivia Casey, Scientific American, 1 Dec. 2023 Some conditions that have autoantibodies and appear to be related to autoimmunity have been excluded from this list. Maddie Bender, Scientific American, 1 Sep. 2021 In the clearest cases, such as Graves’ disease, the illness definitely involves autoantibodies that lead to an immune system assault, inflammation and debilitating symptoms. Maddie Bender, Scientific American, 1 Sep. 2021 The study’s findings correspond with earlier research by Yonker, which also didn’t find increased levels of antibodies or autoantibodies in patients with myocarditis. Elaine Chen Reprints, STAT, 5 May 2023

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'autoantibody.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History


auto- + antibody

First Known Use

1905, in the meaning defined above

Time Traveler
The first known use of autoantibody was in 1905

Dictionary Entries Near autoantibody

Cite this Entry

“Autoantibody.” Dictionary, Merriam-Webster, Accessed 16 Apr. 2024.

Medical Definition


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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