Definition of prophylaxis noun from the Oxford Advanced Learner's Dictionary



BrE BrE//ˌprɒfɪˈlæksɪs//
; NAmE NAmE//ˌprɑːfɪˈlæksɪs//
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action that is taken in order to prevent disease Word Origin mid 19th cent.: modern Latin, from pro- ‘before’ + Greek phulaxis ‘act of guarding’.
See the Oxford Advanced American Dictionary entry: prophylaxis