the nineteenth letter of the Greek alphabet (?, ?)
Origin of tauMiddle English taw, tau (esp. with reference, refer to the tau cross) from Classical Latin tau from Classical Greek from Sem, as in Classical Hebrew (language) tav, tav
The 19th letter of the Greek alphabet. alphabet
Origin of tauGreek of Phoenician origin tww
- The name of the letter Î¤/Ï„ in the Greek, Hebrew and ancient Semitic alphabets, being the nineteenth letter of the Classical and Modern Greek, the twenty-first letter of Old and Ancient Greek.
- A Î¤-shaped sign or structure; a St. Anthony's cross, sometimes considered as a sacred symbol.
- (physics, dated) A tau meson, now usually known as a kaon.
- (physics) An unstable heavy lepton, which decays into a muon or electron; a tauon.
- (biology) A type of protein used to stabilise microtubules.
- (mathematics, neologism) A constant equal to twice the value of pi; often written Ï„.
From Ancient Greek Ï„Î±á¿¦ (tau).