mi·cro·coc·cus 
(mī′krō-kŏkəs)
(mī′krō-kŏkəs)n. pl. mi·cro·coc·ci (-kŏksī′, -kŏkī′)
Any of various spherical, aerobic, gram-positive bacteria of the genus Micrococcus that are usually nonmotile and occur in pairs, tetrads, or irregular clusters.
mi′cro·coccal (-kŏkəl) adj.