Definition of ampicillin in English:

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Pronunciation: /ˌampəˈsilin/


A semisynthetic form of penicillin used chiefly to treat infections of the urinary and respiratory tracts.
Example sentences
  • If you are given treatment for a bacterial infection with the antibiotics ampicillin or amoxycillin, you may develop a rash of small red spots.
  • The patients had been treated with ampicillin, penicillin, or chloramphenicol.
  • For urinary tract infection, we examined resistance to ampicillin or amoxicillin and trimethoprim.


1960s: blend of amino and a contraction of penicillin.

For editors and proofreaders

Syllabification: am·pi·cil·lin

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