doxycycline

noun

doxy·​cy·​cline ˌdäk-sə-ˈsī-ˌklēn How to pronounce doxycycline (audio)
: a broad-spectrum tetracycline antibiotic C22H24N2O8 used orally to treat various bacterial infections

Examples of doxycycline 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.
But a dose of doxycycline or amoxicillin can generally cure it. — Burkhard Bilger, New Yorker, 29 June 2026 However, in certain circumstances, a single dose of doxycycline after a tick bite may lower your risk of Lyme disease. — Jack Armstrong, Memphis Commercial Appeal, 4 May 2026 The illness is effectively treated with the antibiotic doxycycline. — Eva Flowe june 11, Charlotte Observer, 11 June 2026 Common antibiotics used to treat Lyme disease include doxycycline, amoxicillin, and cefuroxime. — Stephen Underwood, Hartford Courant, 9 Apr. 2026 See All Example Sentences for doxycycline

Word History

Etymology

deoxy- + tetracycline

First Known Use

1966, in the meaning defined above

Time Traveler
The first known use of doxycycline was in 1966

Rhymes for doxycycline

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Browse Nearby Words

doxy
doxycycline
doyen
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Cite this Entry

“Doxycycline.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/doxycycline. Accessed 7 Jul. 2026.

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Medical Definition

doxycycline

noun
doxy·​cy·​cline ˌdäk-sə-ˈsī-ˌklēn How to pronounce doxycycline (audio)
: a broad-spectrum tetracycline antibiotic C22H24N2O8 used orally to treat various bacterial infections
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