病原学 bìngyuánxué etiology Definitions Defs Origin Strokes Stroke Words Sentences Sents 病原 bìngyuán pathogen cause of disease; pathogen; the origin or source of an illness; often used as a shorthand for pathogenic bacteria 病原菌 bìngyuánjūn学 學 xué nounaffix branch of learning (bound form) a subject or branch of study; often used as a suffix for -logy, -ics, or -science
