noun
common ancestry; sharing a common ancestor
Used in biological, anthropological, or historical contexts to indicate that two or more groups, species, or individuals descend from the same ancestor.
これらの種は同祖であると考えられている。
These species are thought to share a common ancestor.
同祖の集団は似た文化的特徴を持つことがある。
Groups of common ancestry sometimes share similar cultural traits.