I. pro‧phy‧lac‧tic1 /ˌprɒfəˈlæktɪk◂, ˌprɒfɪˈlæktɪk◂ $ ˌprɑː-/
adjective technical[
Date: 1500-1600;
Language: Greek;
Origin: prophylaktikos, from prophylassein 'to guard before', from phylax 'guard']
intended to prevent disease:
prophylactic antibiotics [TahlilGaran] Dictionary of Contemporary English ▲