coccus

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coc·cus / ˈkäkəs/ • n. (pl. coc·ci / ˈkäkˌ(s)ī; ˈkäkˌ(s)ē/ ) Biol. any spherical or roughly spherical bacterium. DERIVATIVES: coc·cal / ˈkäkəl/ adj. coc·coid / ˈkäkˌoid/ adj.

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coccus (kok-ŭs) n. (pl. cocci) any spherical bacterium. See gonococcus, meningococcus, Micrococcus, pneumococcus, Staphylococcus, Streptococcus.

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coccus (pl. cocci) Any spherical bacterium. Cocci may occur singly, in pairs, in groups of four or more, in cubical packets, in grapelike clusters (Staphylococcus), or in chains (Streptococcus). Staphylococci and streptococci include pathogenic species. They are generally nonmotile and do not form spores.

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coccus A spherical, berry-like structure (e.g. the fruit in Coriariaceae), or a bacterial cell that is spherical, or nearly so. The word is derived from the Greek kokkos, meaning ‘berry’.

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coccus pl. cocci insect of the genus so named XVIII; (bot.) carpel of a dried fruit XIX (earlier coccum); (med.) rounded form of bacterium XIX. — modL. — Gr. kókkos berry, seed.

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coccus Small spherical or spheroid bacterium. Average diameter: 0.5–1.25 micrometres. Some, such as Streptococcus and Staphylococcus, are common causes of infection.