The Collaborative International Dictionary of English v.0.48:

Nihil \Ni"hil\, n. [L.]
   Nothing.
   [1913 Webster]

   Nihil album [L., white nothing] (Chem.), oxide of zinc. See
      under Zinc.

   Nihil debet [L., he owes nothing] (Law), the general issue
      in certain actions of debt.

   Nihil dicit [L., he says nothing] (Law), a declinature by
      the defendant to plead or answer. --Tomlins.
      [1913 Webster]

WordNet (r) 3.0 (2006):

nihil
    n 1: (Latin) nil; nothing (as used by a sheriff after an
         unsuccessful effort to serve a writ); "nihil habet"