A descendant from the same ancestor; or adjective form describing something descended jointly from a common source.
Compound of 'co-' (together) plus 'descendant' (from Latin 'descendere,' to descend), describing shared descent from a common ancestor.
You and your cousin are 'codescendants' from your shared grandparents—the word perfectly captures how you're both branches of the same family tree, whether talking about people, languages, or species!
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