prophylactic

Capable of preventing conception or impregnation.

Warding off.

“the swastika...a very ancient prophylactic symbol occurring among all peoples”

Preventing or contributing to the prevention of disease.

“vaccines are prophylactic”

“a prophylactic drug”

Contraceptive device consisting of a sheath of thin rubber or latex that is worn over the penis during intercourse.

Remedy that prevents or slows the course of an illness or disease.