Definition of fan-in in English:

fan-in

noun

Electronics
  • The number of inputs that can be connected to a circuit.

    • ‘The early applications have been the iSCSI-FC gateways and switches, which address the server fan-in economic challenge of the FC SAN and the connectivity among FC SAN islands across the wide area network.’
    • ‘Upon receiving the invalidate message, the master processors broadcast the invalidate message in an ordered fan-in / fan-out process to each processor in the cluster.’

Pronunciation:

fan-in

/ˈfanˌin/