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
The antibody, bevacizumab (B), is used for the treatment of other cancers and for treatment of macular degeneration.
—
William A. Haseltine, Forbes, 27 Feb. 2025
Marcus was rarely a match for transplants because testing suggested that his antibodies would reject almost any new organ.
—Brian M. Rosenthal, New York Times, 26 Feb. 2025
Immune cells need protein to produce antibodies that recognize and fight germs.12
Fiber: The body needs fiber to aid digestion and maintain a healthy weight and body mass index (BMI).
—Sohaib Imtiaz, Verywell Health, 24 Feb. 2025
These antibodies fight infections and create immunity.
—Jenny Lehmann, Discover Magazine, 24 Feb. 2025
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William A. Haseltine, Forbes, 27 Feb. 2025
Marcus was rarely a match for transplants because testing suggested that his antibodies would reject almost any new organ.
—Brian M. Rosenthal, New York Times, 26 Feb. 2025
Immune cells need protein to produce antibodies that recognize and fight germs.12
Fiber: The body needs fiber to aid digestion and maintain a healthy weight and body mass index (BMI).
—Sohaib Imtiaz, Verywell Health, 24 Feb. 2025
These antibodies fight infections and create immunity.
—Jenny Lehmann, Discover Magazine, 24 Feb. 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 10 Mar. 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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