IgG

noun
\ ˌī-(ˌ)jē-ˈjē How to pronounce IgG (audio) \

Definition of IgG

1 : a class of immunoglobulins including the most common antibodies circulating in the blood that facilitate the phagocytic destruction of microorganisms foreign to the body, that bind to and activate complement, and that are the only immunoglobulins to cross over the placenta from mother to fetus
2 : an antibody of the class IgG

First Known Use of IgG

1965, in the meaning defined at sense 1

Keep scrolling for more

Learn More about IgG

Statistics for IgG

Cite this Entry

“IgG.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/IgG. Accessed 4 Jul. 2020.

Keep scrolling for more

More Definitions for IgG

IgG

noun
\ ˌī-ˌjē-ˈjē How to pronounce IgG (audio) \

Medical Definition of IgG

1 : a class of immunoglobulins that include the most common antibodies circulating in the blood, that facilitate the phagocytic destruction of microorganisms foreign to the body, that bind to and activate complement, and that are the only immunoglobulins to cross over the placenta from mother to fetus
2 : an immunoglobulin of the class IgG

Comments on IgG

What made you want to look up IgG? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

See Definitions and Examples »

Get Word of the Day daily email!

Test Your Vocabulary

A More Exception(al) Quiz

  • hot dog  hot dog  hot dog  hot dog cat
  • Which of the following words is not a synonym for ‘a young person’?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Bee Cubed

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!