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colon bacillus

noun

: e. coli

Word History

First Known Use

1893, in the meaning defined above

Time Traveler
The first known use of colon bacillus was in 1893

Rhymes for colon bacillus

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Colón
colon bacillus
colon crayfish
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Cite this Entry

“Colon bacillus.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/colon%20bacillus. Accessed 5 Dec. 2025.

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Medical Definition

colon bacillus

noun
dated
: any of several bacilli especially of the genus Escherichia that are normally commensal in vertebrate intestines
especially : e. coli
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