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WordNet-Online 
 Definitions from WordNet
Noun infectious agent has 1 sense 
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| Definitions from the WebInfectious AgentNoun: An infectious agent, also known as a pathogen or germ, refers to a biological agent or organism capable of causing infections or diseases in susceptible hosts. Example sentences: 
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| infect  infected infecting infection infectionist infections infectious-diseases infectious infectious agent infectious disease infectious diseases infectious hepatitis infectious mononucleosis infectious polyneuritis infectiously infectist infective 
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