opsonin

noun
op·so·nin | \ˈäp-sə-nən \

Definition of opsonin 

: any of various proteins (such as antibodies or complement) that bind to foreign particles and cells (such as bacteria) making them more susceptible to the action of phagocytes

First Known Use of opsonin

1903, in the meaning defined above

History and Etymology for opsonin

Latin opsonare to buy provisions, cater (from Greek opsōnein) + English -in entry 1 — more at oligopsony

Keep scrolling for more

Learn More about opsonin

Dictionary Entries near opsonin

opsisform

opson-

opsonic

opsonin

-opsy

opt

optable

Statistics for opsonin

Look-up Popularity

Time Traveler for opsonin

The first known use of opsonin was in 1903

See more words from the same year

Keep scrolling for more

More Definitions for opsonin

opsonin

noun
op·so·nin | \ˈäp-sə-nən \

Medical Definition of opsonin 

: any of various proteins (as complement or antibodies) that bind to foreign particles and microorganisms (as bacteria) making them more susceptible to the action of phagocytes

More from Merriam-Webster on opsonin

Britannica.com: Encyclopedia article about opsonin

Comments on opsonin

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

WORD OF THE DAY

lying above or upon

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!