prophylactic

prophy|lac|tic /pr'ɒfɪl'æktɪk/ (prophylactics)
1 [ADJ] usu ADJ n
Prophylactic means concerned with preventing disease. (MEDICAL)
Vaccination and other prophylactic measures can be carried out.
= preventive
2 [N-COUNT]
A prophylactic is a substance or device used for preventing disease. (MEDICAL)
The region began to use quinine successfully as a prophylactic.
3 [N-COUNT]
A prophylactic is a condom. (FORMAL)

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