tau(redirected from tau leptons)
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The 19th letter of the Greek alphabet. See Table at alphabet.
(Letters of the Alphabet (Foreign)) the 19th letter in the Greek alphabet (Τ, τ), a consonant, transliterated as t
[C13: via Latin from Greek, of Semitic origin; see tav]
n., pl. taus.
the 19th letter of the Greek alphabet (T, τ).
[1250–1300; Middle English < Latin < Greek taû < Semitic; compare tav]