Synonyms of 'prophylactic'
1 preventative measure
The region began to use quinine as a prophylactic.
the use of prophylactics for protection against sexually-transmitted disease
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A condom is a covering made of thin rubber which a man can wear on his penis as a contraceptive or as protection against disease during sexual intercourse.
It's much better to use a condom every time you have sex.
This is purely a safety precaution.
Thesaurus for prophylactic from the Collins English Thesaurus
Prophylactic means concerned with preventing disease.