Medical Dictionary


noun in·flu·en·za \ˌin-(ˌ)flü-ˈen-zə\

Medical Definition of INFLUENZA

a :  any of several acute highly contagious respiratory diseases caused by strains of three major orthomyxoviruses now considered to comprise three species assigned to three separate genera: (1) :  influenza a (2) :  influenza b (3) :  influenza c b :  any human respiratory infection of undetermined cause—not used technically
:  any of numerous febrile usually virus diseases of domestic animals (as shipping fever of horses) marked by respiratory symptoms, inflammation of mucous membranes, and often systemic involvement
in·flu·en·zal \-zəl\ adjective
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