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antibiotic

C2
Fairly common

Pronunciation

UK

  • /ˌæntɪbaɪˈɒtɪk/

US

  • /ˌæntaɪbaɪˈɑtɪk/

Meanings

Noun

  1. a medicine that kills bacteria or stops them from growing

Adjective

  1. relating to antibiotics or able to kill bacteria

Beyond the definition

Imagine tiny soldiers inside your body battling an invading army of bacteria. That's essentially what antibiotics do! The word "antibiotic" comes from "anti" (against) and "bios" (life), so it literally means "against life"—specifically, against bacterial life. These powerful medicines are used to fight infections caused by bacteria, like strep throat or a urinary tract infection.

It's important to remember antibiotics don't work on viruses—things like the common cold or flu. Using antibiotics when you have a virus won't help and can even be harmful! Overuse of antibiotics is also creating "superbugs"—bacteria that become resistant to these drugs, making infections harder to treat. So, antibiotics are powerful tools, but they need to be used responsibly and only when prescribed by a doctor.

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Examples

  1. 1

    Prescription

    The doctor prescribed an antibiotic for her ear infection.

  2. 2

    Taking medicine

    This antibiotic should be taken with food.

  3. 3

    Current treatment

    He's been on antibiotics since Monday, so he can't drink alcohol right now.

    • Phrasebe on antibiotics

      be taking this medicine as a treatment

  4. 4

    Complete treatment

    Even though she felt better, she finished the full course of antibiotics.

    • Phrasea course of antibiotics

      the complete treatment over several days

More examples
  1. 5

    Resistance risk

    Using antibiotics when they aren't needed can lead to antibiotic resistance.

    • Domainantibiotic resistance

      when bacteria no longer respond to these medicines

See also

Similar

  • antibacterial drug
  • antibacterial agent

Shades of meaning

  • bactericidal drug
  • bacteriostatic agent

Contrast

Used with (collocations)

  • take antibiotics
  • prescribe antibiotics
  • antibiotic resistance
  • course of antibiotics

Explore

Forms and spellings

2 forms open this card.

Main spelling

  • antibioticnounadjective

Forms

  • antibioticspluralnounadjective