noun \ˈkä-kəs\
plural coc·ci \ˈkä-ˌkī, -ˌkē; ˈkäk-ˌsī, -ˌsē\

Definition of COCCUS

:  a spherical bacterium
coc·cal \ˈkä-kəl\ adjective

Origin of COCCUS

New Latin, from Greek kokkos
First Known Use: 1888


noun \ˈkäk-əs\   (Medical Dictionary)
plural coc·ci \ˈkäk-ˌ(s)ī also -(ˌ)(s)ē\

Medical Definition of COCCUS

: a spherical bacterium


noun    (Concise Encyclopedia)

Spherical bacterium. Many species have characteristic arrangements that are useful in identification. Pairs of cocci are called diplococci; rows or chains, streptococci (see streptococcus); grapelike clusters, staphylococci (see staphylococcus); packets of eight or more cells, sarcinae; and groups of four cells in a square arrangement, tetrads. These characteristic groupings occur as a result of variations in the reproduction process.


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