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swine flu

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noun Pathology.
  1. a highly contagious form of influenza caused by infection with a filterable virus first isolated from swine.
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Origin of swine flu

First recorded in 1920–25
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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swine flu in Science

swine flu

[swīn]
  1. 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.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.