Medical Dictionary

Group A

noun \-ˈā\

Definition of GROUP A

:  the Lancefield group of beta-hemolytic streptococci that comprises all strains of a species of the genus Streptococcus (S. pyogenes) and that includes the causative agents of pharyngitis, scarlet fever, septicemia, some skin infections (as pyoderma and erysipelas), rheumatic fever, and glomerulonephritis—usually used attributively <Group A streptococcal infections>; compare group b
April 01, 2015
diapause Hear it
a period of physiological dormancy
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