* * *mi·cro·coc·cus .mī-krō-'käk-əs n1) cap a large genus (the type genus of the family Micrococcaceae) of nonmotile gram-positive spherical bacteria that occur in tetrads or irregular clusters and include nonpathogenic forms found on human and animal skin
* * *n.a genus of spherical Gram-positive bacteria occurring in colonies. They are saprophytes or parasites. The species M. tetragenus (formerly Gaffkya tetragena) is normally a harmless parasite in humans but it can become pathogenic, causing arthritis, endocarditis, meningitis, or abscesses in tissues. It occurs in groups of four.
* * *Mi·cro·coc·cus (mi″kro-kokґəs) [micro- + Gr. kokkos berry] a genus of bacteria of the family Micrococcaceae, consisting of spherical, gram-positive, aerobic cells, usually occurring in irregular masses. Saprophytic and nonpathogenic forms are found in soil, water, dust, and dairy products; it is an uncommon cause of infective endocarditis. The type species is M. luґteus.
Medical dictionary. 2011.