Definition of psi
:the 23rd letter of the Greek alphabet — see Alphabet Table
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Origin and Etymology of psi
Middle English, from Medieval Latin, from Late Greek, from Greek psei
Origin and Etymology of psi
probably by shortening & alteration from psychic
Definition of psi
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Medical Dictionary
medical Definition of psi
:relating to, concerned with, or being parapsychological psychic events or powers
- psi phenomena
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