Prophylactic:A preventive measure. The word comes from the Greek for "an advance guard," an apt term for a measure taken to fend off adisease或另一个不受欢迎的后果。
A预防is amedicationor a treatment designed and used to prevent a disease from occurring. For example, prophylactic antibiotics may be used after a bout of rheumatic fever to prevent the subsequentdevelopmentof Sydenham'schorea.
A prophylactic is also a drug or device, particularly a condom, for preventing pregnancy.
