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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
Some children are more likely to have an infection from strep bacteria because of a low antibody response to the infection.4
Your body's immune system works to defend you from illnesses.
—Brandi Jones, Msn-Ed, Health, 26 Dec. 2024
The independent Russian news outlet The Moscow Times first reported in 2020 that Spector was listed alongside three Russian nationals by the European Patent Office office as the inventors of an antibody that can be used for treating cancer.
—Andy Biggs, Newsweek, 24 Dec. 2024
The virus has either been isolated from these creatures or antibodies have been found in their systems.
—Geraldine Castro, WIRED, 20 Dec. 2024
The new study, however, also looked into when the drop in antibodies increases the risk of reinfection—and sometimes that may not occur in three months.
—Fran Kritz, Verywell Health, 9 Dec. 2024
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Word History
First Known Use
1894, in the meaning defined above
Phrases Containing antibody
Dictionary Entries Near antibody
Cite this Entry
“Antibody.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/antibody. Accessed 30 Dec. 2024.
Kids 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
More from Merriam-Webster on antibody
Nglish: Translation of antibody for Spanish Speakers
Britannica.com: Encyclopedia article about antibody
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