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Related to orthomyxovirus: paramyxovirus
orthomyxovirus/or·tho·myxo·vi·rus/ (-mik´so-vi″rus) a subgroup of myxoviruses that includes the viruses of human and animal influenza.
n. pl. orthomyxovi·ruses
Any of a family of single-stranded RNA viruses, including the virus that causes influenza.
Etymology: Gk, orthos + mykes, fungus; L, virus, poison
a member of a family of viruses that includes several organisms responsible for human influenza infection.