0 a medicine or chemical that can destroy harmful bacteria in the body or limit their growth -- 抗生素，抗菌素
My doctor's put me on a course of antibiotics and I have to stay off work for a week.
The drugs company are trying to develop a new type of antibiotic.
In those days doctors gave out antibiotics to patients all the time, so they became less effective.
The first antibiotic to be discovered was penicillin.
