psu

noun1

1. •
   Initialism of practical salinity unit.

noun4

1. •
   Initialism of power supply unit.
2. •
   Alternative letter-case form of psu (“practical salinity unit”).
3. •
   Initialism of payment service user.
4. •
   Initialism of primary sampling unit, a sampling unit in the first stage of a polyetapic sampling.