Pronunciation: ˌ o ̇ r-th ō - ' mik-s ə - ˌ v ī -r ə s
Function: noun
Etymology: New Latin, from orth- + myxovirus
Date: 1973
: any of a family ( Orthomyxoviridae ) of single-stranded RNA viruses that have their RNA divided into six to eight segments and that include the causative agents of influenza in vertebrates