英语释义
1. any of several paramyxoviruses (genera Respirovirus and Rubulavirus) that are a frequent cause of infections (such as croup) of the lower respiratory tract especially in infants and children
2. any of several single-stranded RNA viruses (genera Respirovirus and Rubulavirus) of the family Paramyxoviridae that are associated with or responsible for some respiratory infections especially in children — called also parainfluenza