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

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The first known use of Group B was in 1965

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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

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