prophylactic

US /ˌproʊ.fɪˈlæk.tɪk/
UK /ˌproʊ.fɪˈlæk.tɪk/
"prophylactic" picture
1.

intended to prevent disease

:
The doctor prescribed a prophylactic antibiotic to prevent infection.
Wearing a mask can be a prophylactic measure against airborne diseases.
1.

a medicine or treatment designed to prevent disease

:
He takes a daily prophylactic against malaria.
The vaccine acts as a powerful prophylactic.
2.

a condom

:
Always use a prophylactic to prevent sexually transmitted infections.
He carried a prophylactic in his wallet.