tau

'tau' in Webster

Practice English, talk to an artificial intelligence robot -- hear its voice! (hilarious)
In depth article on tau found in wikipedia.


Tau   (tou), n. [Gr.
tay^.]
 The nineteenth letter (&TAU;, &tau;) of
the Greek alphabet, equivalent to English t.
 
Tau   (?), n. [Gr.
tay^ the letter &tau; (English T).]
 (Zoöl.) The common American toadfish; -- so called from a
marking resembling the Greek letter tau (&tau;).
 Tau cross. See Illust. 6, of Cross.

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