1

antibiotic

noun an·ti·bi·ot·ic \ ˌan-tē-bī-ˈä-tik , -ˌtī- ; -bē-ˈä- \

Definition of antibiotic

:a substance produced by or a semisynthetic (see semisynthetic 1) substance derived from a microorganism and able in dilute solution to inhibit or kill another microorganism
  • The doctor prescribed an antibiotic to treat the infection.

Recent Examples of antibiotic from the Web

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

Origin and Etymology of antibiotic

see biotic


2

antibiotic

adjective

Definition of antibiotic

1 :tending to prevent, inhibit, or destroy life
2 :of or relating to antibiotics or to antibiosis
  • antibiotic drugs

antibiotically

play \-ti-k(ə-)lē\ adverb

Recent Examples of antibiotic from the Web

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

Origin and Etymology of antibiotic

see biotic


ANTIBIOTIC Defined for English Language Learners

antibiotic

noun

Definition of antibiotic for English Language Learners

  • medical : a drug that is used to kill harmful bacteria and to cure infections


ANTIBIOTIC Defined for Kids

antibiotic

noun an·ti·bi·ot·ic \ ˌan-ti-bī-ˈä-tik \

Definition of antibiotic for Students

:a substance produced by living things and especially by bacteria and fungi that is used to kill or prevent the growth of harmful germs

Medical Dictionary

1

antibiotic

adjective an·ti·bi·ot·ic \ -bī-ˈät-ik; -bē- \

medical Definition of antibiotic

1 :tending to prevent, inhibit, or destroy life
2 :of or relating to antibiotics or to antibiosis

antibiotically

play \-i-k(ə-)lē\ adverb

2

antibiotic

noun

medical Definition of antibiotic

:a substance produced by or a semisynthetic substance derived from a microorganism and able in dilute solution to inhibit or kill another microorganism


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