Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Medical
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

IgA

play
noun \ˌī-(ˌ)jē-ˈā\

Definition of IgA

  1. 1 :  a class of immunoglobulins including antibodies found in external bodily secretions (as saliva, tears, and sweat)

  2. 2 :  an antibody of the class IgA



Origin of iga

immunoglobulin


First Known Use: 1969


Medical Dictionary

IgA

play
noun \ˌī-ˌjē-ˈā\

Medical Definition of IgA

  1. 1:  a class of immunoglobulins that include antibodies found in external bodily secretions (as saliva, tears, and sweat)

  2. 2:  an immunoglobulin of the class IgA




Learn More about iga

  1. Medical Dictionary: Definition of "IgA" Britannica.com: Encyclopedia article about "IgA"


Seen and Heard

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

WORD OF THE DAY

February 8, 2016

to clear from accusation or blame

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

image1037863653

Which of the following refers to thin, bending ice, or to the act of running over such ice?

pince-nez duvet spindrift kittly-benders
Name That Thing

10 quick questions: hear them, spell them, and see how your skills compare to the crowd.

TAKE THE QUIZ
SCRABBLE® Sprint

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

TAKE THE QUIZ