Tau

3 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Tau \Tau\ (tou), n. [Gr. tay^.]
     The nineteenth letter ([Tau], [tau]) of the Greek alphabet,
     equivalent to English t.
     [Webster 1913 Suppl.]

From The Collaborative International Dictionary of English v.0.48 [gcide]:



  Tau \Tau\, n. [Gr. tay^ the letter [tau] (English {T}).] (Zool.)
     The common American toadfish; -- so called from a marking
     resembling the Greek letter tau ([tau]).
     [1913 Webster]
  
     {Tau cross}. See Illust. 6, of {Cross}.
        [1913 Webster]

From WordNet (r) 2.0 [wn]:

  tau
       n : the 19th letter of the Greek alphabet