ψ

Unicode name GREEK SMALL LETTER PSI Greek and Coptic U+03C8

Translingual

Symbol

ψ

1. (physics) a waveform in Quantum Physics and is used in various forms of the Schrödinger Equation.
$H(t)\left|\psi\left(t\right)\right\rangle = \mathrm{i}\hbar \frac{d}{d t} \left| \psi \left(t\right) \right\rangle$
1. (electrical engineering) Electric flux.

Greek

Letter

ψ ‎(ps) ‎(lowercase, uppercase Ψ)

1. The lower case letter psi (ψι), the 23rd letter of the modern Greek alphabet.

Numeral

ψ'

1. The number 700 in Greek numerals.

1. The number 700,000 in Greek numerals.