Definition of psi

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  • psi is a valid Scrabble US word with a point value of 5
  • psi is a valid Scrabble UK word with a point value of 5
  • psi is a valid Words with friends word with a point value of 6

Definition of psi

  • a unit of pressure (noun)

    Synonyms

    1. pounds per square inch
  • the 23rd letter of the Greek alphabet (noun)

See definition of psi in Merriam Webster