: a class of immunoglobulins including antibodies found in external bodily secretions (such as saliva, tears, and sweat)
: an antibody of the class IgA

Examples of IgA in a Sentence

Recent Examples on the Web Novartis said an experimental drug achieved the goals of a Phase 3 study in participants with IgA nephropathy, a type of kidney disease. Meghana Keshavan, STAT, 30 Oct. 2023 There are different types of immunoglobulins, including IgG, IgM, IgA, IgD, and IgE. Lauren Manaker Ms, Rdn, Ld, Clec, Verywell Health, 21 Sep. 2023 In the trial, 404 patients with the disorder, IgA nephropathy, were randomized to receive either Travere’s daily pill, Filspari, or irbesartan, a decades-old blood pressure drug often used to help manage the disease. Jason Mast Reprints, STAT, 21 Sep. 2023 Like bouncers at a bar, IgA antibodies are the primary immune molecules on guard in the mucosa. Brenda Goodman, CNN, 18 July 2022 The adaptive immune system also provides a high level of protection by producing the antibody immunoglobulin A (IgA) which is transmitted across the surface of the gut epithelial cells to prevent infection. William A. Haseltine, Forbes, 26 Mar. 2022 Mounting evidence supports IgA antibodies as the key to preventing infection. Apoorva Mandavilli, New York Times, 2 Feb. 2022 Breast milk carries a immunoglobulin A (IgA), which is found in the mucous membranes such as those lining the nose or throat, and stops the virus locally. Annalisa Merelli, Quartz, 13 Nov. 2021 Also, researchers led by Prof. Motoki Takagi of Fukushima Medical University, an expert in drug development science, are developing an infection prevention medicine in a form that involves spraying IgA antibodies directly into the nose. BostonGlobe.com, 20 Sep. 2021 See More

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'IgA.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History



First Known Use

1969, in the meaning defined at sense 1

Time Traveler
The first known use of IgA was in 1969

Dictionary Entries Near IgA

Cite this Entry

“IgA.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/IgA. Accessed 1 Mar. 2024.

Medical Definition

: a class of immunoglobulins that include antibodies found in external bodily secretions (as saliva, tears, and sweat)
: an immunoglobulin of the class IgA

More from Merriam-Webster on IgA

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