plural E. coli
: an enterobacterium (Escherichia coli) that is used in public health as an indicator of fecal pollution (as of water or food) and in medicine and genetics as a research organism and that occurs in various strains that may live as harmless inhabitants of the human lower intestine or may produce a toxin causing intestinal illness see enterobacterium illustration

Examples of E. coli in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
In October, the Centers for Disease Control and Prevention connected a fatal E. coli outbreak to McDonald’s Quarter Pounder burgers. Amelia Lucas, CNBC, 28 Jan. 2025 Cooking meat to 165 degrees (74 Celsius) kills bird flu, E. coli, salmonella or anything else. Dee-Ann Durbin, Chicago Tribune, 27 Jan. 2025 The woman's urine was also found to contain high levels of white blood cells or pus, blood and nitrites, indicating the presence of a urinary tract infection (UTI), as well as E. coli and Morganella morganii bacteria. John Yoo and John Shu, Newsweek, 23 Jan. 2025 And tests of raw products show that they are frequently contaminated with harmful viruses and bacteria such as salmonella and E. coli. Cnn.com Wire Service, The Mercury News, 20 Jan. 2025 See all Example Sentences for E. coli 

Word History

First Known Use

1925, in the meaning defined above

Time Traveler
The first known use of E. coli was in 1925

Dictionary Entries Near E. coli

ecol

E. coli

e-collar

Cite this Entry

“E. coli.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/E.%20coli. Accessed 2 Feb. 2025.

Kids Definition

E. coli

noun
plural E. coli
: a bacterium in the shape of a short rod that may cause intestinal illness
Etymology

short for Escherichia coli, the taxonomic name in biology

Medical Definition

E. coli

noun
ˌē-ˈkō-ˌlī
plural E. coli also E. colis
: a straight rod-shaped gram-negative bacterium (Escherichia coli of the family Enterobacteriaceae) that is used in public health as an indicator of fecal pollution (as of water or food) and in medicine and genetics as a research organism and that occurs in various strains that may live as harmless inhabitants of the human lower intestine or may produce a toxin causing intestinal illness marked especially by diarrhea
one million acid-resistant E. coli per gram of fecesJohn Schwartz
this E. coli can survive … longer than all the other E. colisEd Geldreich
Last Updated: - Updated example sentences
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