[dip-luh-kok-uh s]

noun, plural dip·lo·coc·ci [dip-luh-kok-sahy, -see] /ˌdɪp ləˈkɒk saɪ, -si/, Bacteriology.

any of several spherical bacteria occurring in pairs, as Diplococcus pneumoniae.

Origin of diplococcus

From New Latin, dating back to 1886; see origin at diplo-, coccus
Related formsdip·lo·coc·cal, dip·lo·coc·cic [dip-luh-kok-sik] /ˌdɪp ləˈkɒk sɪk/, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for diplococcus

Historical Examples of diplococcus

  • If growth of Diplococcus pneumoniæ occurs, again heat culture in water-bath at 60° C. for one hour and again test for sterility.

  • For instance, not a few healthy noses and throats contain the bacillus of diphtheria and the diplococcus of pneumonia.

    Preventable Diseases

    Woods Hutchinson

  • The presence of such a diplococcus in meningeal exudates is, however, sufficient for its identification.

  • The diplococcus merely produces acidification and coagulation of the milk.

  • The joint lesions which accompany acute rheumatism or “rheumatic fever” are believed to be due to a diplococcus.

    Manual of Surgery

    Alexis Thomson and Alexander Miles

British Dictionary definitions for diplococcus


noun plural -cocci (-ˈkɒksaɪ)

any of various spherical Gram-positive bacteria that occur in pairs, esp any of the genus Diplococcus, such as D. pneumoniae, which causes pneumonia: family Lactobacillaceae
Derived Formsdiplococcal or diplococcic (ˌdɪpləʊˈkɒksɪk, -ˈkɒkɪk), adjective
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

diplococcus in Medicine



n. pl. dip•lo•coc•ci (-kŏksī′, -kŏkī′)

Any of various paired spherical bacteria, including those of the genus Diplococcus, some of which are pathogenic.
Related formsdip′lo•coccal (-kŏkəl) null adj.




A genus of gram-positive anaerobic encapsulated fermenting bacteria having a somewhat elongated spherical shape.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.