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Symbols · Greek letters

ω Ω Omega

Say it: “omega” · oh-MAY-guh (US), OH-mig-uh (UK)

What it means

The last Greek letter. ω is an angular frequency or angular velocity. Capital Ω is the ohm, the unit of resistance, the number of microstates in statistical mechanics, the sample space in probability and the lower bound in Big-Omega notation.

Read aloud in real formulas

Physics

ω = 2πf

Aethel says

omega equals 2 pi f

angular frequency from frequency

Thermodynamics

S = k_B ln Ω

Aethel says

S equals k sub B the natural log of omega

Ω counts the microstates

Typing it

LaTeX
\omega, \Omega
Unicode
U+03C9, U+03A9

Formulas that use it

Questions

How do you pronounce omega (ω)?

It is said “omega”, roughly oh-MAY-guh (US), OH-mig-uh (UK).

What does ω mean in maths?

The last Greek letter. ω is an angular frequency or angular velocity. Capital Ω is the ohm, the unit of resistance, the number of microstates in statistical mechanics, the sample space in probability and the lower bound in Big-Omega notation.

How do you type ω?

In LaTeX, write \omega, \Omega. Its Unicode code point is U+03C9, U+03A9.

Related symbols

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