Diplococcus
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A diplococcus (plural diplococci) is a round bacterium (a coccus) that typically occurs in the form of two joined cells. Examples are Streptococcus pneumoniae, Moraxella catarrhalis, Neisseria gonorrhoeae and Neisseria meningitidis. Of these, all are Gram-negative except for Streptococcus pneumoniae.
Its name comes from diplo, meaning double, and coccus, meaning berry.
In former times, a bacterial genus Diplococcus was recognized, but it is not used anymore.
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