psi
psi Lexical Profile
psi Game Scores & Validity
• noun
An abbreviation for pounds per square inch, a unit of pressure or stress.
"Before driving on the highway, make sure your car tires are inflated to the recommended 32 psi."
The twenty-third letter of the Greek alphabet (Ψ, ψ), transliterated as 'ps'.
"In quantum mechanics, the Greek letter psi is commonly used to represent a wave function."
Supposed parapsychological or psychic phenomena and faculties collectively, such as telepathy, clairvoyance, and psychokinesis.
"The researchers designed a series of controlled card-guessing experiments to test for evidence of psi."
• Rhymes for psi
• Nearby Words
Word Origin & Etymology
Borrowed from Ancient Greek psî (ψῖ), the name of the twenty-third letter of the Greek alphabet. In parapsychology, the term was adopted in the 1940s as a neutral shorthand derived from the initial letter of psyche (mind or soul).