virtual ground
zero-voltage point created in a circuit by means other than direct connection to an external reference
en-US/ˈvɝt͡ʃuəl ˈɡɹaʊnd/
en-GB/ˈvɜːt͡ʃʊəl ˈɡɹaʊnd/
zero-voltage point created in a circuit by means other than direct connection to an external reference