- (physics) angular velocity
- (thermodynamics) acentric factor
- (mathematics, set theory) The first (countably) infinite ordinal number, its corresponding cardinal number ℵ0 or the set of natural numbers (the latter of which are often defined to equal the former).
ω • (o) (lowercase, uppercase Ω)
- The lower case letter omega (ωμέγα), the 24th and last letter of the modern Greek alphabet.
ω! • (o!)