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English to English adjective 1. tending to prevent or hinder  source: wordnet30
2. Going before; preceding.  source: webster1913
adjective satellite 3. preventing or contributing to the prevention of disease  preventive medicine|vaccines are prophylactic|a prophylactic drug source: wordnet30
noun 4. remedy that prevents or slows the course of an illness or disease  the doctor recommended several preventatives source: wordnet30
5. any obstruction that impedes or is burdensome  source: wordnet30
6. an agent or device intended to prevent conception  source: wordnet30
7. That which prevents, hinders, or obstructs; that which intercepts access; in medicine, something to prevent disease; a prophylactic.  source: webster1913
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