A token offering in return for another coin. The initiation of a new cryptocurrency is also known as an ICO.
Candidate Block
In a few words, a candidate block is a block that a mining node (miner) is trying to mine in order to receive the block reward. So a candidate block may be described as a temporary block that will be either validated or discarded by the network. Miners compete with each other to validate the next block and add it to the blockchain, but first, they have to create a candidate block to participate in the mining competition.
Fiat
Fiat money, often known as fiat currency, is money that a government has recognized as legal tender and that it supports.
Pair
Exchange cryptocurrencies with each other, like the trading pair BTC/ETH.