me·​nin·​go·​coc·​cus | \ mə-ˌniŋ-gə-ˈkä-kəs , -ˌnin-jə-\
plural meningococci\ -​ˈkäk-​ˌsī , -​ˌsē ; -​ˈkä-​ˌkī , -​ˌkē \

Definition of meningococcus

: the bacterium (Neisseria meningitidis) that causes cerebrospinal meningitis

Keep scrolling for more

Other Words from meningococcus

meningococcal \ -​ˈkä-​kəl \ or less commonly meningococcic \ -​ˈkäk-​sik , -​ˈkä-​kik \ adjective

Examples of meningococcus in a Sentence

Recent Examples on the Web

The ill student’s case was for meningococcus group B, which is not the same one covered by a vaccine required for incoming students, officials said. George Kelly, The Mercury News, "UC Berkeley: Health officials send meningitis alert after student recovery," 21 Mar. 2017 Many of the cases carry the same strain of meningococcus bacteria, known as serotype C, and have been linked through social connections, according to the health department. Soumya Karlamangla,, "Health officials urge meningitis vaccination amid L.A. Pride festival," 9 June 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'meningococcus.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of meningococcus

circa 1893, in the meaning defined above

History and Etymology for meningococcus

New Latin

Keep scrolling for more

Learn More about meningococcus

Share meningococcus

Statistics for meningococcus

Look-up Popularity

Time Traveler for meningococcus

The first known use of meningococcus was circa 1893

See more words from the same year

Keep scrolling for more

More Definitions for meningococcus


me·​nin·​go·​coc·​cus | \ mə-ˌniŋ-gə-ˈkäk-əs , -ˌnin-jə- \
plural meningococci\ -​ˈkäk-​ˌ(s)ī , -​(ˌ)(s)ē \

Medical Definition of meningococcus

: a bacterium of the genus Neisseria (N. meningitidis) that causes cerebrospinal meningitis

Other Words from meningococcus

meningococcal \ -​ˈkäk-​əl \ also meningococcic \ -​ˈkäk-​(s)ik \ adjective

More from Merriam-Webster on meningococcus Encyclopedia article about meningococcus

Comments on meningococcus

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


esteemed in general opinion

Get Word of the Day daily email!

Test Your Vocabulary

What did you just call me?! A Quiz

  • rows-of-various-emoji
  • If a member of the audience describes your speech as bombastic, does that person mean it is:
Name That Thing

Test your visual vocabulary with our 10-question challenge!

Bee Cubed

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


Love words? Need even more definitions?

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