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tau

  • noun
  • /taʊ/

The letter 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.

Other meanings

  1. A -shaped object or sign; a Saint Anthony's cross, sometimes regarded as a sacred symbol.

  2. A crosier with a -shaped head.

Related words

  • stau
  • tau cross
  • tauon
  • tauopathy
  • tau lepton
  • tau meson
  • tau neutrino
  • tau particle
  • tau protein
  • tau bone
  • tau effect
  • tau staff

Word history

From Hebrew "תָּו".

Where this comes from

This definition is adapted from “tau” on Wiktionary, by its contributors, published under CC BY-SA 4.0. This page is published under the same licence.