Terahash (plural terahashes) (computing, cryptocurrencies) A trillion (1012) hashes.

Skybridge Domains Cloud Block
The Mining Network, Cryptocurrency Mining Matrix MIning
Cryptocurrency Mining Matrix MIning
GPU Mining & ASIC Mining 
Terahash (plural terahashes) (computing, cryptocurrencies) A trillion (1012) hashes.
One terahash is 1 trillion (1,000,000,000) hashes per second. In the context of Bitcoin mining or blockchain, the rate of hashes per second is important because it determines how long it takes to complete a block.  Most ASIC bitcoin miners start at around the 140 Terahash like the Antminer S19J Pro.