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antibiotic

[an-ti-bahy-ot-ik, -bee-, an-tee-, -tahy-] /ˌæn tɪ baɪˈɒt ɪk, -bi-, ˌæn ti-, -taɪ-/
noun
1.
any of a large group of chemical substances, as penicillin or streptomycin, produced by various microorganisms and fungi, having the capacity in dilute solutions to inhibit the growth of or to destroy bacteria and other microorganisms, used chiefly in the treatment of infectious diseases.
adjective
2.
of or involving antibiotics.
Origin
1855-1860
1855-60, for an earlier sense; anti- + biotic
Related forms
antibiotically, adverb
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples for antibiotic
  • The tablets are ampicillin, a common prescription antibiotic similar to penicillin.
  • Bacitracin is a germ-killing medicine called an antibiotic, which is used to treat infections.
  • Bacitracin is a germ-killing medicine called an antibiotic.
  • antibiotic treatment is best reserved for illnesses in which it is likely to be effective.
  • He asked a pharmacist for advice, and an over-the-counter antibiotic ointment cleared it up.
  • The team has also speculated that the frog skin alkaloids might have antibiotic activity.
  • The rare ones that survive reproduce, often creating a population that's antibiotic resistant.
  • There is a video game in which players fire antibiotic ammunition at bacteria.
  • The end of the antibiotic miracle is not a new theme.
  • antibiotic overuse may be the root of other health problems, too.
British Dictionary definitions for antibiotic

antibiotic

/ˌæntɪbaɪˈɒtɪk/
noun
1.
any of various chemical substances, such as penicillin, streptomycin, chloramphenicol, and tetracycline, produced by various microorganisms, esp fungi, or made synthetically and capable of destroying or inhibiting the growth of microorganisms, esp bacteria
adjective
2.
of or relating to antibiotics
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
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Word Origin and History for antibiotic
adj.

1894, "destructive to micro-organisms," from French antibiotique (c.1889), from anti- "against" (see anti-) + biotique "of (microbial) life," from Late Latin bioticus "of life" (see biotic). As a noun, first recorded 1941 in works of U.S. microbiologist Selman Waksman (1888-1973), discoverer of streptomycin. Earlier the adjective was used in a sense "not from living organisms" in debates over the origins of certain fossils.

Online Etymology Dictionary, © 2010 Douglas Harper
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antibiotic in Medicine

antibiotic an·ti·bi·ot·ic (ān'tĭ-bī-ŏt'ĭk, ān'tī-)
n.
A substance, such as penicillin or streptomycin, produced by or derived from certain fungi, bacteria, and other organisms, that can destroy or inhibit the growth of other microorganisms. adj.

  1. Of or relating to antibiotics.

  2. Of or relating to antibiosis.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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antibiotic in Science
antibiotic
  (ān'tĭ-bī-ŏt'ĭk)   
Noun  A substance, such as penicillin, that is capable of destroying or weakening certain microorganisms, especially bacteria or fungi, that cause infections or infectious diseases. Antibiotics are usually produced by or synthesized from other microorganisms, such as molds. They inhibit pathogens by interfering with essential intracellular processes, including the synthesis of bacterial proteins. Antibiotics do not kill viruses and are not effective in treating viral infections.

Adjective  
  1. Relating to antibiotics.

  2. Relating to antibiosis.


The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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antibiotic in Culture
antibiotic [(an-ti-beye-ot-ik, an-teye-beye-ot-ik, an-ti-bee-ot-ik)]

A substance that destroys or inhibits the growth of microorganisms and is therefore used to treat some infections. One of the most familiar antibiotics is penicillin.

Note: Microorganisms that are initially treatable with antibiotics may evolve resistance as the more susceptible members of the population are killed off. (See resistance to antibiotics.)
The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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