tetracycline

noun
tet·​ra·​cy·​cline | \ˌte-trə-ˈsī-ˌklēn, -klən\

Definition of tetracycline 

: a yellow crystalline broad-spectrum antibiotic C22H24N2O8 produced by streptomyces or synthetically also : any of several chemically related antibiotics (such as doxycycline)

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Did You Know?

Most chemical names are made up of two or more Greek and Latin roots strung together. Thus, tetracycline, with its cycl- root from the Greek word for "circle", means "four-ringed"—that is, "consisting of four fused hydrocarbon rings". Antibiotics work against bacteria and other tiny organisms (but not viruses); tetracycline, which comes from a kind of soil bacteria, is one of the most used of the antibiotics. "Broad-spectrum" antibiotics work well on numerous organisms; thus, tetracycline has proved effective against acne, chlamydia, cholera, rickets, and various lung and eye infections, among many other conditions.

Examples of tetracycline in a Sentence

Recent Examples on the Web

The exceptions are aspirin and the antibiotic tetracycline, which can deteriorate soon after expiration dates. Linda A. Johnson, chicagotribune.com, "Pill expiration dates can have wiggle room if stored right," 4 May 2018 The exceptions are aspirin and the antibiotic tetracycline, which can deteriorate soon after expiration dates. Linda A. Johnson, chicagotribune.com, "Pill expiration dates can have wiggle room if stored right," 4 May 2018 The exceptions are aspirin and the antibiotic tetracycline, which can deteriorate soon after expiration dates. Linda A. Johnson, chicagotribune.com, "Pill expiration dates can have wiggle room if stored right," 4 May 2018 The exceptions are aspirin and the antibiotic tetracycline, which can deteriorate soon after expiration dates. Linda A. Johnson, chicagotribune.com, "Pill expiration dates can have wiggle room if stored right," 4 May 2018 Aureomycin spawned a class of antibiotics called the tetracyclines still used for everything from soft tissue infections to malaria prophylaxis. Aaron Gilbreath, Longreads, "We Are Scientists," 5 June 2018 The exceptions are aspirin and the antibiotic tetracycline, which can deteriorate soon after expiration dates. Linda A. Johnson, chicagotribune.com, "Pill expiration dates can have wiggle room if stored right," 4 May 2018 The exceptions are aspirin and the antibiotic tetracycline, which can deteriorate soon after expiration dates. Linda A. Johnson, chicagotribune.com, "Pill expiration dates can have wiggle room if stored right," 4 May 2018 The exceptions are aspirin and the antibiotic tetracycline, which can deteriorate soon after expiration dates. Linda A. Johnson, chicagotribune.com, "Pill expiration dates can have wiggle room if stored right," 4 May 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'tetracycline.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of tetracycline

1952, in the meaning defined above

History and Etymology for tetracycline

International Scientific Vocabulary tetracyclic having four fused hydrocarbon rings + -ine entry 2

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The first known use of tetracycline was in 1952

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More Definitions for tetracycline

tetracycline

noun
tet·​ra·​cy·​cline | \ˌte-trə-ˈsī-ˌklēn, -klən \

Medical Definition of tetracycline 

: a yellow crystalline broad-spectrum antibiotic that is produced by a soil actinomycete of the genus Streptomyces (S. viridifaciens) or made synthetically and that is administered chiefly in the form of its hydrochloride C22H24N2O8·HCl also : any of several chemically related antibiotics (as doxycycline)

More from Merriam-Webster on tetracycline

Britannica.com: Encyclopedia article about tetracycline

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