tau cross

from WordNet (r) 3.0 (2006)

tau cross
    n 1: cross resembling the Greek letter tau [syn: {tau cross},
         {St. Anthony's cross}]

from The Collaborative International Dictionary of English v.0.48

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]