Final answer:
In the ICTV system, a virus name ending in 'viridae' is part of the Family grouping.
Step-by-step explanation:
Using the International Committee on Taxonomy of Viruses (ICTV) taxonomy system, a virus name ending in 'viridae' indicates that the virus is part of the taxonomy grouping known as a Family. The ICTV classifies viruses into various levels of hierarchy such as orders, families, and genera. Family names in the ICTV system are characterized by the suffix '-viridae', such as in the case of Parvoviridae. Conversely, genus names end in '-virus', such as Parvovirus. This system is vital for organizing the vast diversity of viral species based on their genetics, chemistry, morphology, and mechanisms of multiplication.