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prophylactic

美国发音:[.prɑfə'læktɪk]
英国发音:[.prɒfə'læktɪk] [n]
预防剂
防病的物质
避孕用品[药物]
【医学】预防药;预防法
[adj]
预防的
防病的
【医学】预防(性)的

Able to prevent disease.
A prophylactic medicine is a medicine which can prevent a disease from attacking a person. A device which can prevent a disease is a prophylactic. Vaccination is a prophylactic process, because it prevents diseases from entering human body. A vaccine is a prophylactic.