Word forms: prophylactics
1. adjective [usu ADJ n]
Prophylactic means concerned with preventing disease. [medicine] ⇒ Vaccination and other prophylactic measures can be carried out.
2. countable noun
A prophylactic is a substance or device used for preventing disease. [medicine] ⇒ The region began to use quinine successfully as a prophylactic.
3. countable noun
A prophylactic is a condom. [formal] ⇒ The prospect of teachers passing out prophylactics to their pupils has infuriated some parents.
COBUILD Advanced English Dictionary. Copyright © Harper Collins Publishers