pathogen

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pathogen /ˈpæθəʤən/ noun
plural pathogens
pathogen
/ˈpæθəʤən/
noun
plural pathogens
Learner's definition of PATHOGEN
[count] medical
: something (such as a type of bacteria or a virus) that causes disease

— pathogenic

/ˌpæθəˈʤɛnɪk/ adjective [more pathogenic; most pathogenic]