swine flu

[ swahyn-floo ]
/ ˈswaɪn ˈflu /
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noun Pathology.
a form of influenza that afflicts pigs.
a form of influenza that afflicts humans by infection with a virus once thought to be very similar to the influenza virus found in North American pigs.


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See also H1N1.

Origin of swine flu

First recorded in 1920–25
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

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Scientific definitions for swine flu

swine flu
[ swīn ]

A highly contagious form of influenza seen in swine, caused by a virus of the family Orthomyxoviridae. The infection is communicable to humans and caused a worldwide epidemic in 1918.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.