Lancefield group

noun
Lance·​field group | \ ˈlan(t)s-ˌfēld- How to pronounce Lancefield group (audio) \
variants: also Lancefield's group \ -​ˌfēldz-​ How to pronounce Lancefield's group (audio) \

Medical Definition of Lancefield group

: any of the serologically distinguishable groups into which most streptococci can be divided and which are based on the polysaccharide antigens present in the streptococcal cell walls — see group a, group b

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