tau

• Nom masculin désignant la dix-neuvième lettre de l'alphabet grec, transcrite par le symbole τ.

A noun referring to the 19th letter of the Greek alphabet.

1. Greek letterB2formal

   The 19th letter of the Greek alphabet (Τ, τ), often used in mathematics and science to represent various concepts.

   tau (lettre grecque)

   • The symbol tau is used to represent torque in physics.
   • In mathematics, tau is sometimes used as a constant equal to 2π.
   • The Greek letter tau looks similar to the English letter T.