Relating to or describing the relationship between grandparents and grandchildren.
From grand- (meaning 'great' or next generational level) plus filial (from Latin filius meaning 'son,' used more broadly for the relationship of children to parents). The term extends the concept of filial relationships across a generational boundary.
The word 'filial' comes from Latin and was historically used in religious contexts to describe the duty of children to honor their parents—the 'filial piety' concept was especially important in Christianity. Adding 'grand-' to it creates a term for family bonds that skip a generation.
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