spirochetal

adjective

spi·ro·chet·al ˌspī-rə-ˈkē-tᵊl

: caused by spirochetes

Word History

Etymology

spirochete + -al entry 1

First Known Use

1913, in the meaning defined above

Time Traveler

The first known use of spirochetal was in 1913

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spiro atom

spirochetal

spirochete

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Cite this Entry

Style

“Spirochetal.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/spirochetal. Accessed 3 Feb. 2026.

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Medical Definition

spirochetal

adjective

spi·ro·chet·al

variants or chiefly British spirochaetal

ˌspī-rə-ˈkēt-ᵊl

: relating to or caused by spirochetes

spirochetal infection

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spirochetal

adjective

Word History

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