"ˌ noun
Etymology: New Latin, from para- + myxovirus (I) (herein)
: any of a family (Paramyxoviridae) of large single-stranded RNA viruses (as a morbillivirus or parainfluenza virus) that have a helical nucleocapsid and lipid-containing envelope and that include the causative agents of measles, mumps, respiratory diseases, and canine distemper