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.

See Examples For:

doxycycline

Those treated with doxycycline showed a 30-35 percent lower risk of later developing schizophrenia compared with peers who received other types of antibiotics.

From Science Daily ● Nov. 6, 2025

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

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

From Science Daily ● Mar. 19, 2024

Her primary care physician prescribed doxycycline, but that was also ineffective.

From Seattle Times ● Dec. 6, 2023

Patients who are not pregnant can use the antibiotic doxycycline to treat syphilis, but health officials are concerned that the 14- to 28-day timeline of treatment is difficult to complete, leaving infected people uncured.

From Seattle Times ● Nov. 7, 2023

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