influenza


in·flu·en·za

noun \ˌin-(ˌ)flü-ˈen-zə\

medical : a common illness that is caused by a virus and that causes fever, weakness, severe aches and pains, and breathing problems

Full Definition of INFLUENZA

1
a (1) :  an acute typically severe respiratory disease caused by an orthomyxovirus (species Influenza A virus of the genus Influenzavirus A) and marked by sudden onset, fever, prostration, severe aches and pains, and progressive inflammation of the respiratory mucous membranes —called also influenza A (2) :  either of two usually milder or even subclinical respiratory diseases caused by two other orthomyxoviruses (species Influenza B virus of the genus Influenzavirus B and species Influenza C virus of the genus Influenzavirus C) —often used with the letter B or C to denote the causative species
b :  any of various human respiratory infections of undetermined cause —not used technically
2
:  any of numerous febrile usually virus diseases of domestic animals marked by respiratory symptoms, inflammation of mucous membranes, and often systemic involvement
in·flu·en·zal \-zəl\ adjective

Origin of INFLUENZA

Italian, literally, influence, from Medieval Latin influentia; from the belief that epidemics were due to the influence of the stars
First Known Use: 1743

in·flu·en·za

noun \ˌin-(ˌ)flü-ˈen-zə\   (Medical Dictionary)

Medical Definition of INFLUENZA

1
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
2
: 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

influenza

noun    (Concise Encyclopedia)

Acute viral infection of the upper or lower respiratory tract. Influenza viruses A (the most common), B, and C produce similar symptoms, but infection with or vaccination against one does not give immunity against the others. Chills, fatigue, and muscle aches begin abruptly. The temperature soon reaches 38–40 °C (101–104 °F). Head, muscle, abdominal, and joint aches may be accompanied by sore throat. Recovery starts in three to four days, and respiratory symptoms become more prominent. Bed rest, high fluid intake, and aspirin or other antifever drugs are standard treatment. Influenza A tends to occur in wavelike annual pandemics. Mortality is usually low, but in rare outbreaks (see influenza epidemic of 1918–19) it reaches immense proportions. Most deaths result from pneumonia or bronchitis.

Variants of INFLUENZA

influenza or flu or grippe

Browse

Next Word in the Dictionary: influx
Previous Word in the Dictionary: influential (noun)
All Words Near: influenza

Seen & Heard

What made you want to look up influenza? Please tell us where you read or heard it (including the quote, if possible).