doxycycline

noun

doxy·​cy·​cline ˌdäk-sə-ˈsī-ˌklēn 

: a broad-spectrum tetracycline antibiotic C₂₂H₂₄N₂O₈ used orally to treat various bacterial infections

Examples of doxycycline in a Sentence

Recent Examples on the Web

But anyone who is not pregnant and does not have neurological symptoms – which require intravenous penicillin – can be cured with a course of another antibiotic, doxycycline, for 14-28 days. —Casey Pinto, The Conversation, 1 May 2026

Common antibiotics used to treat Lyme disease include doxycycline, amoxicillin, and cefuroxime. —Stephen Underwood, Hartford Courant, 9 Apr. 2026

These include quinolones such as Cipro (ciprofloxacin) and tetracyclines such as Doryx (doxycycline). —Megan Nunn, Verywell Health, 8 Apr. 2026

This entails inserting chemicals such as doxycycline or talcum powder into the area so that the two layers of the pleural membrane remain stuck together. —Bruce Y. Lee, Forbes.com, 20 Mar. 2026

Word History

Etymology

deoxy- + tetracycline

First Known Use

1966, in the meaning defined above

Rhymes for doxycycline

• anthracycline
• minocycline
• tetracycline
• chlortetracycline
• oxytetracycline

Medical Definition

doxycycline

noun

doxy·​cy·​cline ˌdäk-sə-ˈsī-ˌklēn 

: a broad-spectrum tetracycline antibiotic C₂₂H₂₄N₂O₈ used orally to treat various bacterial infections