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Definition tau

Etymology

Borrowed from Ancient Greek ταῦ (taû). The physics sense was coined by American physicist Martin Perl.

Noun

tau (plural taus)

  1. The letter Τ/τ 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.
  2. A Τ-shaped sign or structure; a Saint Anthony's cross, sometimes regarded as a sacred symbol.
  3. (physics, dated) A tau meson, now usually known as a kaon.
  4. (physics) An unstable heavy lepton, which decays into a muon or electron; a tauon.
  5. (biology) Tau protein, a type of protein that stabilizes microtubules in the human central nervous system, failures of which are associated with forms of dementia.
  6. (finance) A measurement of the sensitivity of the value of an option to changes in the implied volatility of the price of the underlying asset.
  7. (mathematics, neologism) An irrational and transcendental constant representing the ratio of the circumference of a Euclidean circle to its radius, approximately 6.2831853071; equal to twice the value of pi. Often written τ.

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10 letter words with the letters TAU 

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