pneumovirus
noun
pneu·mo·vi·rus
ˈn(y)ü-mō-ˌvī-rəs
plural pneumoviruses
: any of a family (Pneumoviridae) of single-stranded RNA viruses that have a filamentous or spherical virion with a lipid-containing envelope, typically cause respiratory infections in mammals and birds, include the respiratory syncytial virus and metapneumovirus, and were formerly classified as paramyxoviruses
Birds infected with avian pneumovirus experience nasal discharge, coughing, tracheal rales, conjunctivitis and sinusitis.—Branden Peterson
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Merriam-Webster unabridged
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