I read through the whitepaper of Satoshi Nakamoto.
I could find the expression 'blocks are chained...' but he did not specifically use the word 'blockchain' itself.
I want to know the origin of the term blockchain....
The first use of the phrase "block chain" was by Hal Finney in his response to Satoshi's email with the whitepaper. Over time, the two words have been combined into the single word "blockchain".