Hm when I hear "tree", i'd expect it to be at least somewhat balanced. Wikipedia also has "Hash chain" and seems to be a better fit to me, but at that point we

Hm when I hear "tree", i'd expect it to be at least somewhat balanced. Wikipedia also has "Hash chain" and seems to be a better fit to me, but at that point we are basically arguing semantics. But yes, "blockchain" as used today is more than what we are talking about.