ˌdiplōˈkäkəs noun
Etymology: New Latin, from dipl- + -coccus
1. plural diplococ·ci -äˌkī, -äkē, -äkˌsī, -äksē : a pair of adherent cocci (sense 2)
2. capitalized : a genus of gram-positive somewhat elongated encapsulated bacteria (family Lactobacillaceae) that occur usually in pairs and sometimes in chains, are parasitic growing best in the animal body but poorly in artificial media, and include serious pathogens, as the pneumococcus ( D. pneumoniae )
3. plural diplococci : any bacterium of the genus Diplococcus