Greek lc tau.png
τ U+03C4, τ
GREEK SMALL LETTER TAU
σ
[U+03C3]
Greek and Coptic υ
[U+03C5]

TranslingualEdit

 
When a circle's radius is 1 unit, its circumference is τ units.

SymbolEdit

τ

  1. (physics) torque
  2. (physics) shear stress
  3. (mathematics, neologism) 2π, an irrational constant defined as the ratio of the circumference of a circle to its radius, equal to the radian measure of a full turn; approximately 6.283185307 (twice the value of π).
  4. (physics) tauon

See alsoEdit


GreekEdit

LetterEdit

τ (t) (lowercase, uppercase Τ)

  1. The lower case letter tau (ταυ), the 19th letter of the modern Greek alphabet.

See alsoEdit