
Greek Alphabet / Letters / Symbols 
Greek letters are
commonly used as numerical prefixes and to represent physical and mathematical quantities. After only four years
of engineering school, we have all written most of them hundreds of times. Most of us know the entire Greek
alphabet my heart, kind of like the learning a language by immersion method  you do it without knowing.
Unfortunately, as with a language, a lot of it disappears after many years of sparse usage.
Included in the
table are common uses for the Greek symbols in engineering. All are used on occasion for representing angles.
If you know of others that should be added, please send me an
email.
Alpha 
A 
α 

Beta 
Β 
β 
modulation index 
Gamma 
Γ 
γ 
reflection coefficient 
Delta 
Δ 
δ 
difference 
Epsilon 
Ε 
ε 
dielectric coefficient, permittivity 
Zeta 
Ζ 
ζ 

Eta 
Η 
η 

Theta 
Θ 
θ 
vector angle 
Iota 
Ι 
ι 

Kappa 
Κ 
κ 

Lambda 
Λ 
λ 
wavelength 
Mu 
Μ 
μ 
permeability 

Nu 
Ν 
ν 
frequency 
Xi 
Ξ 
ξ 

Omicron 
Ο 
ο 

Pi 
Π 
π 

Rho 
Ρ 
ρ 
resistivity 
Sigma 
Σ 
σ 

Tau 
Τ 
τ 
time, group delay 
Upsilon 
Υ 
υ 

Phi 
Φ 
φ 

Chi 
Χ 
χ 

Psi 
Ψ 
ψ 

Omega 
Ω 
ω 
resistance, impedance 




