[ kok-uh s ]
/ ˈkɒk əs /

noun, plural coc·ci [kok-sahy, -see] /ˈkɒk saɪ, -si/.

Bacteriology. a spherical bacterium.
Botany. one of the carpels of a schizocarp.

Origin of coccus

1755–65; < New Latin < Greek kókkos grain, seed, berry
Related formscoc·cal, coc·cic [kok-sik] /ˈkɒk sɪk/, adjectivecoc·cous, adjective

Definition for coccus (2 of 2)


a combining form representing coccus in compound words: streptococcus. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for coccus

British Dictionary definitions for coccus


/ (ˈkɒkəs) /

noun plural -ci (-saɪ)

any spherical or nearly spherical bacterium, such as a staphylococcusCompare bacillus (def. 1), spirillum (def. 1)
the part of a fruit that contains one seed and separates from the whole fruit at maturity
any of the scale insects of the genus Coccus
Derived Formscoccoid, coccal or coccic (ˈkɒksɪk), adjectivecoccous, adjective

Word Origin for coccus

C18: from New Latin, from Greek kokkos berry, grain
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for coccus



1763 as an insect genus (including the cochineal bug); 1883 as a type of bacterium, from Greek kokkos "grain, seed, berry" (see cocco-).

Online Etymology Dictionary, © 2010 Douglas Harper

Medicine definitions for coccus (1 of 2)


[ kŏkəs ]

n. pl. coc•ci (kŏksī, kŏkī)

A bacterium of round, spheroidal, or ovoid form.
Related formscoccoid′ (kŏkoid′) null adj.

Medicine definitions for coccus (2 of 2)



A microorganism of spherical or spheroidal shape:streptococcus.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Science definitions for coccus


[ kŏkəs ]

Plural cocci (kŏksī, kŏkī)

Any of various bacteria having a round or ovoid form such as streptococcus or staphylococcus, usually grouped in chains.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.