taus

Noun

tau (plural taus)

1. The letter Τ /τ in the Greek alphabet; being the nineteenth letter of the Classical and Modern Greek, and the twenty-first letter of the Old and Ancient Greek alphabets.
2. A Τ-shaped object or sign; a Saint Anthony's cross, sometimes regarded as a sacred symbol.
   • Nor ſhall we take in the myſticall Tau, or the Croſſe of our bleſſed Saviour, which having in ſome deſcriptions an Empedon or croſſing foot-ſtay, made not one ſingle tranſverſion.1658, Thomas Browne, “The Garden of Cyrus. […]. Chapter I.”, in Hydriotaphia, Urne-buriall, […] Together with The Garden of Cyrus, […], London: […] Hen[ry] Brome […], →OCLC, page 96
   1. A crosier with a Τ-shaped head.
3. The ankh symbol (☥).

   Synonyms:

   crux ansata

4. Chiefly written τ: used to designate the nineteenth star (usually according to brightness) in a constellation.
5. A measurement of the sensitivity of the value of an option to changes in the implied volatility of the price of the underlying asset.
   • (includes a list of coordinate terms)

   Synonyms:

   kappa, vega

See all 8 meanings of tau