Medical Dictionary


noun \ˈhōst\

Medical Definition of HOST

:  a living animal or plant on or in which a parasite lives—see definitive host, intermediate host
:  the larger, stronger, or dominant one of a commensal or symbiotic pair
a :  an individual into which a tissue or part is transplanted from another b :  an individual in whom an abnormal growth (as a cancer) is proliferating
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