Merriam-Webster Logo
SINCE 1828
Menu
×

reagin

noun re·agin \ rē-ˈā-jən , -gən \

Definition of reagin

1 : a substance in the blood of persons with syphilis responsible for positive serological reactions for syphilis
2 : an antibody (such as IgE in humans) that mediates hypersensitive allergic reactions of rapid onset
—

reaginic

play \ˌrē-ə-ˈji-nik, -ˈgi-\ adjective

Origin and Etymology of reagin

International Scientific Vocabulary, from reagent

Medical Dictionary

reagin

noun re·agin \ rē-ˈā-jən , -gən \

medical Definition of reagin

1 : a substance that is in the blood of individuals with syphilis and is responsible for positive serological reactions for syphilis
2 : an antibody (as IgE in humans) that mediates hypersensitive allergic reactions of rapid onset
—

reaginic

play \ˌrē-ə-ˈjin-ik, -ˈgin-\ adjective

Learn More about reagin

  1. See words that rhyme with reagin Britannica.com: Encyclopedia article about reagin

Seen and Heard

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

show hide

Love words? Need even more definitions?

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

WORD OF THE DAY

mercurial

play

changing quickly and often

Get Word of the Day daily email!

TRENDING NOW

  1. socialism 'a way of organizing a society in which major industries are owned and controlled by the government'

  2. uphold 'to let stand'

  3. due process 'a course of formal proceedings (as judicial proceedings)'

  4. asylum 'protection from arrest and extradition given especially to political refugees'

  5. insubordinate 'disobedient to authority'

SEE ALL

BROWSE DICTIONARY

reagin

Test Your Vocabulary

Obscure Shapes

  • a-pile-of-three-dimensional-shapes-in-green
  • Something that is ooid is shaped like:
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Add Diction

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!

Words at Play

Ask the Editors

Word Games