antibody

noun
an·​ti·​body | \ˈan-ti-ˌbä-dē \

Definition of antibody 

: 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

With the antibody that can tag and isolate Nb2 cells, Sánchez Alvarado and others can now look in more detail at how the tetraspanin works and what turns on its production in these cells. Elizabeth Pennisi, Science | AAAS, "This one, newly discovered cell can remake a whole animal," 14 June 2018 Now, the recipient’s blood can be filtered to remove the potentially deal-breaking antibodies. Shari Rudavsky, Indianapolis Star, "1 doctor, 2,000+ kidney transplants. If surgeons kept stats, he’d be LeBron James.," 26 Apr. 2018 After three months, patients treated with the human antibody were nearly three times more likely to have reduced their migraine days by 50 percent or more, than those treated with placebo. NBC News, "New drug uses antibodies to stop chronic migraines, without side effects," 17 Apr. 2018 The rare antibodies contained in James Harrison’s blood helped save the lives of 2.4 million babies. James Hohmann, Washington Post, "The Daily 202: Trump voters stay loyal because they feel disrespected," 14 May 2018 That year, Teresa Romero Ramos, a nurse's aide who contracted the virus while caring for Ebola patients in Spain, was treated with an IV drip of antibodies from an Ebola survivor as well as favipiravir. Jacqueline Howard, CNN, "Ebola outbreak 2018: What's different this time?," 29 May 2018 People with a wheat allergy respond to wheat proteins by churning out a class of antibodies called immunoglobulin E that can set off vomiting, itching, and shortness of breath. Kelly Servick, Science | AAAS, "What’s really behind ‘gluten sensitivity’?," 23 May 2018 In a wheat allergy, the proteins in wheat other than gluten trigger a systemic immune reaction involving the production of antibodies. Carolyn Todd, Allure, "How to Tell If You Have Non-Celiac Gluten Sensitivity," 21 May 2018 And the patient may have developed antibodies to the first donor heart, meaning the immune system could be more likely to reject a second transplant. Tom Avril, Philly.com, "He had 2 heart transplants. At 43, as a new dad, he needed a third," 13 June 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'antibody.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of antibody

1894, in the meaning defined above

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Last Updated

12 Dec 2018

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Time Traveler for antibody

The first known use of antibody was in 1894

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More Definitions for antibody

antibody

noun

English Language Learners Definition of antibody

medical : a substance produced by the body to fight disease

antibody

noun
an·​ti·​body | \ˈan-ti-ˌbä-dē \
plural antibodies

Kids Definition of antibody

: a substance produced by special cells of the body that counteracts the effects of a disease germ or its poisons

antibody

noun
an·​ti·​body | \ˈant-i-ˌbäd-ē \
plural antibodies

Medical Definition of antibody 

: 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

Keep scrolling for more

More from Merriam-Webster on antibody

Rhyming Dictionary: Words that rhyme with antibody

Spanish Central: Translation of antibody

Nglish: Translation of antibody for Spanish Speakers

Britannica.com: Encyclopedia article about antibody

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