dip·lo·coc·cus 
(dĭp′lō-kŏkəs)
(dĭp′lō-kŏkəs)n. pl. dip·lo·coc·ci (-kŏksī′, -kŏkī′)
Any of various paired spherical bacteria, including those of the genus Diplococcus, some of which are pathogenic.
dip′lo·coccal (-kŏkəl), dip′lo·coccic (-kŏksĭk, -kŏkĭk) adj.