Greek alphabet
Greek letters, and the quantities and units they are used for.
| letter | lowercase | used for | uppercase | used for |
|---|---|---|---|---|
| alpha | α | alpha particle | Α | |
| beta | β | beta paticle | Β | |
| gamma | γ | gamma photon | Γ | gamma constant |
| delta | δ | Δ | ||
| epsilon | ε | electron capture | Ε | |
| zeta | ζ | Ζ | ||
| eta | η | Η | ||
| theta | θ | Θ | ||
| iota | ι | Ι | ||
| kappa | κ | Κ | ||
| lambda | λ | decay constant | Λ | |
| mu | μ | attenuation coefficient | Μ | |
| nu | ν |
frequency
neutrino |
Ν | |
| xi | ξ | Ξ | ||
| omicron | ο | Ο | ||
| pi | π | 180º | Π | |
| rho | ρ | density | Ρ | |
| sigma | σ | standard deviation | Σ | summation sign |
| tau | τ | Τ | ||
| upsilon | υ | Υ | ||
| phi | φ | flux density | Φ | fluence |
| chi | χ | Χ | ||
| psi | ψ | Ψ | ||
| omega | ω | Ω |
ohm
solid angle |
Last modified:30 December 2025 1.04 p.m.
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