The difficulty is a measure of how hard it is to produce a Proof-of-Work, required to publish a block to the blockchain. Bitcoin's difficulty updates periodically so that Bitcoin blocks arrive every 10 minutes, probabilistically.| River
A blockchain is a chronological list of records, called blocks. Each of these blocks contains transactions. Once a block is added to the blockchain, it is infeasible to alter, giving Bitcoin its immutability.| River
An Application-Specific Integrated Circuit (ASIC) is a special electronic chip built for exactly one purpose. Bitcoin ASIC miners, the hardware devices that contain these chips, are designed solely to hash blocks in order to find a valid Proof-of-Work.| River
A seed is a piece of data which can be used to generate all of the public and private keys in a wallet. It is often represented as a Mnemonic Phrase.| River