O antigen

noun

: an antigen that occurs in the body of a gram-negative bacterial cell

called also somatic antigen

compare h antigen

Dictionary Entries Near O antigen

OA

O antigen

oat cell

See More Nearby Entries 

Cite this Entry

“O antigen.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/O%20antigen. Accessed 26 Jan. 2023.

Copy Citation

Share

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

Listen to the pronunciation of knackered

See Definitions and Examples »

Test Your Vocabulary

The Great British Vocabulary Quiz

  • union jack speech bubble
  • Named after Sir Robert Peel, what are British police called?
Spell It

Hear a word and type it out. How many can you get right?

TAKE THE QUIZ
Solve today's spelling word game by finding as many words as you can with using just 7 letters. Longer words score more points.

Can you make 12 words with 7 letters?

PLAY
Words at Play
Ask the Editors
Word Games