antibody
noun
an·ti·body
ˈan-ti-ˌbä-dē 
: 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
Avidity specializes in developing an innovative class of ribonucleic acid (RNA) therapeutics called antibody oligonucleotide conjugates.
—
Liz Napolitano, CNBC, 26 Oct. 2025
Patient 3’s immune system, however, didn’t produce as many antibodies after the procedure, suggesting that the therapy may not have efficiently reached its target, Whitton says.
—Lisa Jarvis, Twin Cities, 19 Oct. 2025
Milejkowski and his colleagues found that emaciated children had no antibodies against tuberculosis.
—Clayton Dalton, New Yorker, 18 Oct. 2025
Additionally, pregnant women are recommended to receive a maternal RSV during 32 through 36 weeks of pregnancy to protect against RSV and pass on antibodies to their baby, which can protect for up to six months after birth.
—Mary Kekatos, ABC News, 17 Oct. 2025
See All Example Sentences for antibody
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Liz Napolitano, CNBC, 26 Oct. 2025
Patient 3’s immune system, however, didn’t produce as many antibodies after the procedure, suggesting that the therapy may not have efficiently reached its target, Whitton says.
—Lisa Jarvis, Twin Cities, 19 Oct. 2025
Milejkowski and his colleagues found that emaciated children had no antibodies against tuberculosis.
—Clayton Dalton, New Yorker, 18 Oct. 2025
Additionally, pregnant women are recommended to receive a maternal RSV during 32 through 36 weeks of pregnancy to protect against RSV and pass on antibodies to their baby, which can protect for up to six months after birth.
—Mary Kekatos, ABC News, 17 Oct. 2025
See All Example Sentences for antibody
Cite this Entry
“Antibody.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/antibody. Accessed 29 Oct. 2025.
Copy CitationKids Definition
antibody
noun
an·ti·body
ˈant-i-ˌbäd-ē
: 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
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
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