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tau US English

The nineteenth letter of the Greek alphabet (Τ, τ), transliterated as ‘t.’

tau New Oxford Dictionary for Writers & Editors

nineteenth letter of the Greek alphabet (𝚻, 𝛕), transliterated as ‘t’

Tau in tau US English

The nineteenth star in a constellation

tau cross US English

A T-shaped cross

tau neutrino US English

A neutrino of the type associated with the tau particle

tau particle in tau US English

An unstable subatomic particle of the lepton class, with a charge of −1 and a mass roughly 3,500 times that of the electron