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doxycycline

American

[dok-see-sahy-kleen, -klin] / ˌdɒk siˈsaɪ klin, -klɪn /

noun

Pharmacology.

a synthetic analog of a broad-spectrum antibiotic tetracycline drug, C 22 H 24 N 2 O 8 , used against a wide range of susceptible Gram-positive and Gram-negative organisms.

doxycycline British

/ ˌdɒksɪˈsaɪklɪn /

noun

a tetracycline antibiotic used to treat conditions caused by a wide range of bacteria, including anthrax

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of doxycycline

Contraction of deoxytetracycline

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

One of the first things they did as husband and wife was to take doxycycline pills from their local health centre.

From BBC • Jul. 23, 2025

Officials call the treatment doxy PEP, short for doxycycline postexposure prophylaxis.

From Seattle Times • Jun. 4, 2024

Studies have demonstrated doxycycline works in that group, but there’s not sufficient evidence to make the same recommendation for other people, agency officials said.

From Seattle Times • Jun. 4, 2024

Most patients receive doxycycline, an antibiotic that usually clears up the infection.

From Science Daily • Mar. 19, 2024

That data also confirmed the model's predictions that the absorption of doxycycline is affected by digoxin, levetiracetam, and tacrolimus.

From Science Daily • Feb. 20, 2024

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023