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[strep-tuh-kok-uh s] /ˌstrɛp təˈkɒk əs/
noun, plural streptococci
[strep-tuh-kok-sahy, -see] /ˌstrɛp təˈkɒk saɪ, -si/ (Show IPA).
any of several spherical or oval bacteria of the genus Streptococcus, occurring in pairs or chains, certain species of which are pathogenic for humans, causing scarlet fever, tonsillitis, etc.
Origin of streptococcus
From New Latin, dating back to 1875-80; See origin at strepto-, coccus
Related forms
[strep-tuh-kok-uh l] /ˌstrɛp təˈkɒk əl/ (Show IPA),
[strep-tuh-kok-sik] /ˌstrɛp təˈkɒk sɪk/ (Show IPA),
adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for streptococcus


noun (pl) -cocci (-ˈkɒkaɪ; US) (-ˈkɒksaɪ)
any Gram-positive spherical bacterium of the genus Streptococcus, typically occurring in chains and including many pathogenic species, such as S. pyogenes, which causes scarlet fever, sore throat, etc: family Lactobacillaceae Often shortened to strep
Derived Forms
streptococcal (ˌstrɛptəʊˈkɒkəl), (rare) streptococcic (ˌstrɛptəʊˈkɒkɪk; US) (-ˈkɒksɪk) 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
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Word Origin and History for streptococcus

bacteria genus, 1877, Modern Latin, coined by Viennese surgeon Albert Theodor Billroth (1829-1894) from Greek streptos "twisted" + Modern Latin coccus "spherical bacterium," from Greek kokkos "berry" (see cocco-). So called because the bacteria usually form chains.

Online Etymology Dictionary, © 2010 Douglas Harper
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streptococcus in Medicine

streptococcus strep·to·coc·cus (strěp'tə-kŏk'əs)
n. pl. strep·to·coc·ci (-kŏk'sī, -kŏk'ī)
A bacterium of the genus Streptococcus.

strep'to·coc'cal or strep'to·coc'cic adj.

Streptococcus n.
A genus of gram-positive, anaerobic, often pathogenic bacteria having an ovoid or spherical appearance and occurring in pairs or chains, including many erythrocytolytic and pathogenic species that cause erysipelas, scarlet fever, and septic sore throat in humans.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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streptococcus in Science
Plural streptococci (strěp'tə-kŏk'sī, -kŏk'ī)
Any of various bacteria of the genus Streptococcus that are gram-positive cocci and are normally found on the skin and mucous membranes and in the digestive tract of mammals. One type of streptococcus, Group A, is a common pathogen in humans and causes various infections, including strep throat, scarlet fever, pneumonia, and some types of impetigo.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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streptococcus in Culture
streptococcus [(strep-tuh-kok-uhs)]

A category of bacteria that can cause various infections in humans, including scarlet fever and strep throat.

The New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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