ψ (EN)

letter, symbol

letter “ψ”

1. the 23rd letter of the Greek alphabet
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   In the Greek word "ψυχή" (psyche), the letter "ψ" is the first character.

symbol “ψ”

1. (in quantum mechanics) a wavefunction, representing the quantum state of a particle
   The Schrödinger equation describes how the wavefunction ψ changes over time.
2. (in psychology) a symbol for psychology or psychologists
   She decided to study psychology, often represented by the symbol ψ.
3. (in electrical engineering) electric flux
   The electric flux ψ through the surface was calculated using Gauss's law.
4. (in physics and biochemistry) water potential, measuring the tendency of water to move
   The water potential ψ inside the cell was higher than outside, causing water to flow out.
5. (in Christianity) an abbreviation for the Book of Psalms
   The choir sang passages from ψ during the church service.
6. (in astrology) a symbol for the asteroid Psyche
   The astrologer noted the position of ψ in the natal chart.