Swine influenza

Medical Dictionary

swine influenza n.
A highly contagious form of human influenza caused by a filterable virus identical or related to a virus formerly isolated from infected swine. Also called swine flu.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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WordNet
swine influenza

noun
an acute and highly contagious respiratory disease of swine caused by the orthomyxovirus thought to be the same virus that caused the 1918 influenza pandemic 
WordNet® 3.0, © 2006 by Princeton University.
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