im·​mu·​no·​glob·​u·​lin | \ ˌi-myə-nō-ˈglä-byə-lən How to pronounce immunoglobulin (audio) , i-ˌmyü-nō- \

Definition of immunoglobulin

: antibody The glycoproteins produced by B-cells, called antibodies or immunoglobulins, recognize and bind free antigens and are responsible for humoral immunity …— Haruo Saito et al. abbreviation Ig

Examples of immunoglobulin in a Sentence

Recent Examples on the Web Padmanabhan discovered that high-dose intravenous immunoglobulin, often called IVIG, can help treat immune reactions. Karen Weintraub, USA TODAY, "Scientists begin to unravel rare blood clotting disorder connected to J&J and AstraZeneca vaccines," 8 Apr. 2021 For those presenting symptoms and testing positive for the specific antibody response, doctors in Europe have recommended an injection of immunoglobulin, which is used to fight immune-system disorders and can slow the progression of the clotting. Washington Post, "Europe’s vaccine divide: Science is unclear in AstraZeneca blood clot probes, but nations opt for caution," 6 Apr. 2021 Isolating the cause has allowed scientists to identify how to treat patients who have developed the blot clots, by giving them intravenous immunoglobulin, which targets the antibody, and blood thinners. Rachel Sandler, Forbes, "European Scientists Say They Know Why AstraZeneca’s Vaccine Is Causing Rare Blood Clots," 20 Mar. 2021 Intravenous immunoglobulin, a rich source of antibodies to help a sick person fight off the virus, has been the subject of a few small trials suggesting a possible benefit. USA Today, "What science has learned works and what doesn’t in COVID treatments," 14 Mar. 2021 With a quick spritz up the nose, intranasal vaccines are designed to bolster immune defenses in the mucosa, triggering production of an antibody known as immunoglobulin A, which can block infection. Daniel P. Oran, Scientific American, "To Beat COVID, We May Need a Good Shot in the Nose," 1 Mar. 2021 The immune system that patrols your outward-facing mucosal surfaces—spaces like the nose, the throat, the lungs, and digestive tract—relies on immunoglobulin A, or IgA antibodies. Katherine Ellen Foley, Quartz, "Can you spread Covid-19 if you get the vaccine?," 11 Jan. 2021 These tests detect disease-fighting molecules called antibodies, in particular one called immunoglobulin M, or IgM, which is usually the first type of antibody roused against infectious invaders. Katherine J. Wu, New York Times, "China’s New Testing Policy for Travelers Is Problematic, Experts Say," 13 Nov. 2020 Clinical trials underway involve convalescent plasma, monoclonal antibodies and immunoglobulin. Chronicle Staff,, "Coronavirus news from the Bay Area: Oct. 30-Nov. 5," 6 Nov. 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'immunoglobulin.' 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 immunoglobulin

1953, in the meaning defined above

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Time Traveler for immunoglobulin

Time Traveler

The first known use of immunoglobulin was in 1953

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Statistics for immunoglobulin

Last Updated

27 Apr 2021

Cite this Entry

“Immunoglobulin.” Dictionary, Merriam-Webster, Accessed 7 May. 2021.

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More Definitions for immunoglobulin


im·​mu·​no·​glob·​u·​lin | \ -ˈgläb-yə-lən How to pronounce immunoglobulin (audio) \

Medical Definition of immunoglobulin

: antibody abbreviation Ig

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