| coccus | <microbiology> A bacterium with a rounded or spherical shape. (09 Oct 1997) |
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| Weichselbaum's coccus | A species of gram-negative, aerobic bacteria found in cerebrospinal fluid as the causative agent of cerebrospinal meningitis (meningitis, meningococcal) as well as in venereal discharges and blood. (12 Dec 1998) |
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| Neisser's coccus | A species of gram-negative, aerobic bacteria primarily found in purulent venereal discharges. It is the causative agent of gonorrhoea. (12 Dec 1998) |