Group B

noun

Definition of Group B 

: any of various strains of a streptococcus (Streptococcus agalactiae) that include the causative agents of certain infections (such as pneumonia and meningitis) especially of newborn infants usually used attributively Group B streptococcal infections

First Known Use of Group B

1965, in the meaning defined above

Keep scrolling for more

Learn More about Group B

Statistics for Group B

Look-up Popularity

Time Traveler for Group B

The first known use of Group B was in 1965

See more words from the same year

Keep scrolling for more

More Definitions for Group B

Group B

noun
\-ˈbē \

Medical Definition of Group B 

: the Lancefield group of usually beta-hemolytic streptococci that comprises all strains of a species of the genus Streptococcus (S. agalactiae) and that includes the causative agents of certain infections (as septicemia, pneumonia, and meningitis) especially of newborn infants usually used attributively affected with Group B strep — compare group a

Comments on Group B

What made you want to look up Group B? 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?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

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!