prophylactic
adjective/ˌprɒfəˈlæktɪk/
/ˌprəʊfəˈlæktɪk/
(medical)- done or used in order to prevent a disease
- prophylactic treatment
Word Originlate 16th cent.: from French prophylactique, from Greek prophulaktikos, from pro ‘before’ + phulassein ‘to guard’.Definitions on the go
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prophylactic