antibody

noun

an·​ti·​body ˈan-ti-ˌbä-dē How to pronounce antibody (audio)
: any of a large number of proteins of high molecular weight that are produced normally by specialized B cells after stimulation by an antigen and act specifically against the antigen in an immune response, that are produced abnormally by some cancer cells, and that typically consist of four subunits including two heavy chains and two light chains

called also immunoglobulin

Examples of antibody in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Babies of mothers that did not receive the RSV vaccine can also benefit from an antibody known as Nirsevimab, which offers direct protection for about five months against RSV through pre-formed antibodies injected into the body. Omer Awan, Forbes, 3 Nov. 2024 As Smithsonian reported, antivenom can be complicated to produce, as a donor animal must be injected with the venom — and then their antibodies harvested to make the treatment. Cara Lynn Shultz, People.com, 31 Oct. 2024 Hepatitis tests: Blood tests can detect evidence of viral hepatitis by identifying the virus or the immune proteins (antibodies) that fight a specific virus. Heidi Moawad, Verywell Health, 17 Oct. 2024 People who received the vaccine also produced antibodies that indicated multitiered mucosal immunity, not simply the adaptive immunity from a shot in the arm. Stephani Sutherland, Scientific American, 15 Oct. 2024 See all Example Sentences for antibody 

Word History

First Known Use

1894, in the meaning defined above

Time Traveler
The first known use of antibody was in 1894

Dictionary Entries Near antibody

Cite this Entry

“Antibody.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/antibody. Accessed 23 Nov. 2024.

Kids Definition

antibody

noun
an·​ti·​body ˈant-i-ˌbäd-ē How to pronounce antibody (audio)
: a substance produced by special cells of the body that combines with an antigen and counteracts its effects or those of the microscopic plant or animal on which the antigen may occur

Medical Definition

antibody

noun
an·​ti·​body ˈant-i-ˌbäd-ē How to pronounce antibody (audio)
plural antibodies
: any of a large number of proteins of high molecular weight that are produced normally by specialized B cells after stimulation by an antigen and act specifically against the antigen in an immune response, that are produced abnormally by some cancer cells, and that typically consist of four subunits including two heavy chains and two light chains

called also immunoglobulin

More from Merriam-Webster on antibody

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