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coccus

UK:**UK and possibly other pronunciationsUK and possibly other pronunciations/ˈkɒkəs/US:USA pronunciation: respellingUSA pronunciation: respelling(kokəs)

Inflections of 'coccus' (n): npl: cocci

WordReference Random House Unabridged Dictionary of American English © 2026
coc•cus  (kokəs),USA pronunciation n., pl. -ci (-sī, -sē).USA pronunciation 
  1. Microbiology[Bacteriol.]a spherical bacterium. See diag. under bacteria. 
  2. Botanyone of the carpels of a schizocarp.
  • Greek kókkos grain, seed, berry
  • Neo-Latin
  • 1755–65;
coccous, adj. 

-coccus, 
  1. a combining form representing coccus in compound words:streptococcus.

Collins Concise English Dictionary © HarperCollins Publishers::
coccus /ˈkɒkəs/ n ( pl -ci /-saɪ/)
  1. any spherical or nearly spherical bacterium, such as a staphylococcus
    Compare bacillus, spirillum
Etymology: 18th Century: from New Latin, from Greek kokkos berry, grainˈcoccoid, cocˈcoidal, ˈcoccal, coccic /ˈkɒksɪk/ adj
'coccus' also found in these entries (note: many are not synonyms or translations):

Forum discussions with the word(s) "coccus" in the title:


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