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pathogen

noun [C]
 
 
/ˈpæθ.ə.dʒən/

Definition

any small organism, such as a virus or a bacterium that can cause disease: a dangerous pathogenBacteria, moulds, germs and viruses pathogenic
 
 
/ˌpæθ.əˈdʒen.ɪk/ adjective
Bacteria, moulds, germs and viruses
(Definition of pathogen noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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