Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Medical
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

Group B

noun

Definition of Group B

  1. :  any of various strains of a streptococcus (Streptococcus agalactiae) that include the causative agents of certain infections (as pneumonia and meningitis) especially of newborn infants <Group B streptococcal infections>



1965

First Known Use of group b

1965


Medical Dictionary

Group B

play
noun \-ˈbē\

Medical Definition of Group B

  1. :  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




Learn More about group b

  1. Medical Dictionary: Definition of "Group B"


Seen and Heard

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

February 10, 2016

to put in good humor

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

image1037863653

Which of the following refers to thin, bending ice, or to the act of running over such ice?

kittly-benders spindrift duvet pince-nez
Name That Thing

10 quick questions: hear them, spell them, and see how your skills compare to the crowd.

TAKE THE QUIZ
SCRABBLE® Sprint

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

TAKE THE QUIZ