immunoglobulin
noun
im·mu·no·glob·u·lin
ˌi-myə-nō-ˈglä-byə-lən 
i-ˌmyü-nō-
: 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
Haruo Saito et al.Examples of immunoglobulin in a Sentence
Recent Examples on the Web
Replacement immunoglobulin therapy provides a patient with antibodies when their body can’t make them on its own, enabling them to better fight off infection.
—Chantelle Lee, Time, 15 Dec. 2025
Whether to reaffirm the current standard recommending a birth dose of vaccine and immunoglobulin for children of women whose hepatitis B status is unknown.
—Jamie Gumbrecht, CNN Money, 5 Dec. 2025
These included cholesterol levels, blood sugar, blood pressure and inflammation markers, and immunoglobulin A (IgA).
—Khloe Quill, FOXNews.com, 23 Nov. 2025
However, instead of releasing the IgE protein, their immune system releases other proteins, such as immunoglobulin G (IgG).119
Both true allergies and hypersensitivities share similar symptoms and are often difficult to distinguish.
—Joy Emeh, Health, 15 Oct. 2025
See All Example Sentences for immunoglobulin
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Chantelle Lee, Time, 15 Dec. 2025
Whether to reaffirm the current standard recommending a birth dose of vaccine and immunoglobulin for children of women whose hepatitis B status is unknown.
—Jamie Gumbrecht, CNN Money, 5 Dec. 2025
These included cholesterol levels, blood sugar, blood pressure and inflammation markers, and immunoglobulin A (IgA).
—Khloe Quill, FOXNews.com, 23 Nov. 2025
However, instead of releasing the IgE protein, their immune system releases other proteins, such as immunoglobulin G (IgG).119
Both true allergies and hypersensitivities share similar symptoms and are often difficult to distinguish.
—Joy Emeh, Health, 15 Oct. 2025
See All Example Sentences for immunoglobulin
Cite this Entry
“Immunoglobulin.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/immunoglobulin. Accessed 28 Dec. 2025.
Copy CitationMedical Definition
immunoglobulin
noun
im·mu·no·glob·u·lin
-ˈgläb-yə-lən
: antibody
—abbreviation Ig
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