parainfluenza virus

Medical Dictionary

parainfluenza virus n.
Any of five types of viruses of the genus Paramyxovirus that are associated with various respiratory infections, especially in children.

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
parainfluenza virus

noun
a virus that causes upper respiratory infection (including the common cold and bronchiolitis); most often in children 
WordNet® 3.0, © 2006 by Princeton University.
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