Wiktionary
parainfluenza
n. Any of a group of single-stranded RNA viruses belonging to the family ''Paramyxoviridae'', which are the second most common cause of lower respiratory tract infection in younger children.
WordNet
Usage examples of "parainfluenza".
Steve could protect him from distemper and leptospirosis and parainfluenza, but it was up to me to defend him against human beings.
It is also related to certain pneumonia viruses: to the parainfluenza virus, which causes colds in children, and to the respiratory syncytial virus, which can cause fatal pneumonia in a person who has AIDS.