NCIt definition : A single-stranded, negative-sense RNA virus of the Paramyxoviridae family.;
Alternative definition : CDISC: Any viral organism that can be assigned to the genus Paramyxovirus.; NCI-GLOSS: A type of virus that has hemagglutinin-neuraminidase proteins in the outer
coat and RNA as the genetic material. Measles (rubeola) virus, mumps virus, and Newcastle
disease virus are paramyxoviruses.;