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
But your doctors will also want to evaluate objective markers of inflammation, like lab test results for certain antibodies, protein in your urine and markers of inflammation, Czarny says.
—
Korin Miller, Flow Space, 6 Jan. 2026
The vaccine council is also considering the RSV antibody shot for infants.
—Erika Edwards, NBC news, 5 Jan. 2026
And for patients facing extreme limitations to mobility, or who live vast distances from hospitals and clinics, mobile medical practitioners could offer MIT microparticle emulsion as a no-fuss, no-muss solution – a literal solution of antibodies in a single injection.
—New Atlas, 30 Dec. 2025
Unlike most adults, Sizemore had not had fifth disease as a child and did not have any antibodies of the disease to protect her from infection.
—Nicole Villalpando, Austin American Statesman, 23 Dec. 2025
See All Example Sentences for antibody
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Korin Miller, Flow Space, 6 Jan. 2026
The vaccine council is also considering the RSV antibody shot for infants.
—Erika Edwards, NBC news, 5 Jan. 2026
And for patients facing extreme limitations to mobility, or who live vast distances from hospitals and clinics, mobile medical practitioners could offer MIT microparticle emulsion as a no-fuss, no-muss solution – a literal solution of antibodies in a single injection.
—New Atlas, 30 Dec. 2025
Unlike most adults, Sizemore had not had fifth disease as a child and did not have any antibodies of the disease to protect her from infection.
—Nicole Villalpando, Austin American Statesman, 23 Dec. 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 12 Jan. 2026.
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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