[ noo-muh-kok-uhs, nyoo‐ ]
/ ˌnu məˈkɒk əs, ˌnyu‐ /
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noun, plural pneu·mo·coc·ci [noo-muh-kok-sahy, ‐see, nyoo‐]. /ˌnu məˈkɒk saɪ, ‐si, ˌnyu‐/.
a bacterium, Diplococcus pneumoniae, causing lobar pneumonia and associated with certain other diseases, as pericarditis and meningitis.
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Origin of pneumococcus

From New Latin, dating back to 1885–90; see origin at pneumo-, -coccus

OTHER WORDS FROM pneumococcus

pneu·mo·coc·cal [noo-muh-kok-uhl, nyoo‐], /ˌnu məˈkɒk əl, ˌnyu‐/, pneu·mo·coc·cic [noo-muh-kok-sik, nyoo‐], /ˌnu məˈkɒk sɪk, ˌnyu‐/, pneu·mo·coc·cous [noo-muh-kok-uhs, nyoo‐], /ˌnu məˈkɒk əs, ˌnyu‐/, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

How to use pneumococcus in a sentence

  • In pneumococcal and typhoid infections, also, the organisms may be found in the blood.

    Manual of Surgery|Alexis Thomson and Alexander Miles

British Dictionary definitions for pneumococcus

/ (ˌnjuːməʊˈkɒkəs) /

noun plural -cocci (-ˈkɒkaɪ)
a spherical bacterium that occurs in the respiratory tract, esp the Gram-positive Diplococcus pneumoniae, which causes pneumonia

Derived forms of pneumococcus

pneumococcal, 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

Medical definitions for pneumococcus

[ nōō′mə-kŏkəs ]

n. pl. pneu•mo•coc•ci (-kŏksī′, -kŏkī′)
A nonmotile, gram-positive bacterium (Streptococcus pneumoniae) that is the most common cause of bacterial pneumonia and is associated with meningitis and other infectious diseases.

Other words from pneumococcus

pneu′mo•coccal (-kŏkəl) adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.