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

Examples of immunoglobulin in a Sentence

Recent Examples on the Web

These proteins, such as immunoglobulins that support the immune system, are thought to help digestion and boost immunity. —Julie Scott, Verywell Health, 25 Aug. 2025

The scientists combined MoNi with water and therapeutic proteins including albumin, human immunoglobulin, and a monoclonal antibody treatment for COVID-19. —New Atlas, 22 Aug. 2025

Most patients received a combination of therapies, including steroids and immunoglobulins. —Katia Hetter, CNN Money, 19 Aug. 2025

People who are within six days of exposure to the virus may be able to be treated with immunoglobulin, the CDC reports. —Kristen Jordan Shamus, Freep.com, 7 Aug. 2025

Word History

Etymology

immuno- + globulin

First Known Use

1953, in the meaning defined above

Phrases Containing immunoglobulin

• intravenous immunoglobulin

Rhymes for immunoglobulin

• antiglobulin
• lactoglobulin
• macroglobulin
• thyroglobulin
• globulin

Medical Definition

immunoglobulin

noun

im·​mu·​no·​glob·​u·​lin -ˈgläb-yə-lən 

: antibody

—abbreviation Ig