noun[mass noun] Medicine
An antibiotic with a wide range of activity, used in many medicinal preparations.
- Her general practitioner had treated it unsuccessfully with neomycin and gramicidin ointment and oral flucloxacillin and metronidazole.
- In fact, gramicidin is one of the first known antibiotics.
- These interesting properties have made gramicidin an appropriate model for studying solvent effects on the structural changes of peptides and proteins.
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