Dictionary.com

tau

[ tou, taw for 1, 2, 4; tahv, tawv for 3 ]
/ taʊ, tɔ for 1, 2, 4; tɑv, tɔv for 3 /
Save This Word!

noun
the 19th letter of the Greek alphabet (T, τ).
the consonant sound represented by this letter.
tav.
Also tau·on [tou-on] /ˈtaʊ ɒn/ .Physics. tau lepton.
Also called tau protein .Biochemistry. a protein that is an important component of nerve cells, helping to maintain their function and structure: in the brain, distortions in the protein’s molecular shape is associated with the onset of Alzheimer’s disease.
QUIZ
WILL YOU SAIL OR STUMBLE ON THESE GRAMMAR QUESTIONS?
Smoothly step over to these common grammar mistakes that trip many people up. Good luck!
Question 1 of 7
Fill in the blank: I can’t figure out _____ gave me this gift.

Origin of tau

1250–1300; Middle English <Latin <Greek taû<Semitic; cf. tav
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use tau in a sentence

British Dictionary definitions for tau

tau
/ (tɔː, taʊ) /

noun
the 19th letter in the Greek alphabet (Τ, τ), a consonant, transliterated as t

Word Origin for tau

C13: via Latin from Greek, of Semitic origin; see tav
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
FEEDBACK