What Is A Distributed Ledger And How Is It Different From Blockchain?

[Kou]

When I search for bitcoin and blockchain, many sites state that it's a decentralized, distributed ledger. But when I search for distributed ledger, almost all the article I've read explain it just like blockchain. I was really confused. Just what's the difference between those two? If there's no difference, then why are we using two words to describe the same thing?
I found this article and I think it helps me understand a bit more. A distributed ledger is something more general, while blockchain is more specific. Blockchain is a form of distributed ledger that has a particular structure of a chain of blocks linked to one another and secured by cryptography. Every blockchain is a distributed ledger, but not every distributed ledger is a blockchain. ( newbie deactivated link:https://ninja.org/blog/distributed-ledger-vs-blockchain/ [nonactive])
I hope this could help someone who's confused like I was, understand it better. Also, I'd love to hear more explanation about the difference between blockchain and distributed ledger. Thank you.