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prophylactic

noun [C]
 
 
/ˌprɒf.ɪˈlæk.tɪk/ US  /ˌprɑː.fɪ-/

Definition

specialized something that is intended to prevent diseasePassing on illness and causing disease mainly US a condomContraception
(Definition of prophylactic noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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