alpha-hemolytic streptococci

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α-hemolytic strep·to·coc·ci

streptococci that form a green variety of reduced hemoglobin in the area of the colony on a blood agar medium.
See also: Streptococcus viridans.

α-hemolytic streptococci

Streptococci that, when grown on blood-agar, produce a zone of partial hemolysis around each colony and often impart a greenish appearance to the agar. Included are S. pneumoniae and viridans group streptococci.
See also: streptococcus