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