coccus coc·cus (kŏk'əs)
n. pl. coc·ci (kŏk'sī, kŏk'ī)
A bacterium of round, spheroidal, or ovoid form.
| coccus (kŏk'əs) Pronunciation Key
Plural cocci (kŏk'sī, kŏk'ī) Any of various bacteria having a round or ovoid form such as streptococcus or staphylococcus, usually grouped in chains. |