IgM

noun
\ˌī-(ˌ)jē-ˈem \

Definition of IgM 

1 : a class of immunoglobulins of high molecular weight including the primary antibodies that are released into the blood early in the immune response to be replaced later by IgG and that are highly efficient in binding complement

2 : an antibody of the class IgM

First Known Use of IgM

1969, in the meaning defined at sense 1

Keep scrolling for more

Learn More about IgM

Dictionary Entries near IgM

igigi

I girder

igloo

IgM

ign

ignaro

Ignarro

Statistics for IgM

Look-up Popularity

Time Traveler for IgM

The first known use of IgM was in 1969

See more words from the same year

Keep scrolling for more

More Definitions for IgM

IgM

noun
\ˌī-ˌjē-ˈem \

Medical Definition of IgM 

1 : a class of immunoglobulins of high molecular weight that include the primary antibodies released into the blood early in the immune response to be replaced later by IgGs of lower molecular weight and that are highly efficient in binding complement

2 : an immunoglobulin of the class IgM

Comments on IgM

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

WORD OF THE DAY

exaggeratedly or childishly emotional

Get Word of the Day daily email!

Test Your Vocabulary

Words from Greek and Roman Mythology Quiz

  • the-triumph-of-venus-by-alessandro-magnasco
  • Boreal comes from the name of the ancient Greek god of which wind?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

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!