prophylactic

Acting to defend against or prevent something, especially disease; protective.

A prophylactic agent, device, or measure, such as a vaccine or drug.

A contraceptive device, especially a condom.

In medicine, preventive; defending from disease: as, prophylactic doses of quinine.

Anything, as a medicine, which defends against disease; a preventive of disease.

Same as prophylaxis.

A medicine which preserves or defends against disease; a preventive.

Defending or preserving from disease; preventive.

A medicine which preserves or defends against disease; a preventive.

Specifically, a prophylactic condom.