Source : Webster's Revised Unabridged Dictionary (1913)

Cotta \Cot"ta\, n. [LL. See {Coat}.]
   1. (Eccl.) A surplice, in England and America usually one
      shorter and less full than the ordinary surplice and with
      short sleeves, or sometimes none.

   2. A kind of very coarse woolen blanket.