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 agency's new guidance says that tracking measles immunity status is important to help health departments quickly identify people who need to be vaccinated or offered antibody injections in the case of an outbreak within a camp.
—
Faris Tanyos, CBS News, 13 June 2025
And so, on a rainy late April day in Seattle, Castelli stood at a lectern before his friends and family and defended his doctoral thesis — about using stem cells to express antibodies against HIV — with his scientific life at a crossroads.
—Evan Bush, NBC news, 8 May 2025
Finally, researchers added a second antibody isolated from Friede’s blood, called SNX-B03, which extended protection across 19 species.
—Katie Hunt, CNN Money, 2 May 2025
People who got plasma exchange therapy paired with immune antibodies saw the largest effect, rolling back their biological clocks by an average of 2.6 years.
—Jamie Ducharme, Health, 6 June 2025
See All Example Sentences for antibody
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Faris Tanyos, CBS News, 13 June 2025
And so, on a rainy late April day in Seattle, Castelli stood at a lectern before his friends and family and defended his doctoral thesis — about using stem cells to express antibodies against HIV — with his scientific life at a crossroads.
—Evan Bush, NBC news, 8 May 2025
Finally, researchers added a second antibody isolated from Friede’s blood, called SNX-B03, which extended protection across 19 species.
—Katie Hunt, CNN Money, 2 May 2025
People who got plasma exchange therapy paired with immune antibodies saw the largest effect, rolling back their biological clocks by an average of 2.6 years.
—Jamie Ducharme, Health, 6 June 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 22 Jun. 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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