[1] : 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
see also:
nihil album zinc nihil debet nihil dicit 

[2] : WordNet (r) 2.0

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

Nihil >> N Words
Nihil, definition of term: Nihil
nihil_pag1.html

Nihil Obstat >> N Words
Nihil Obstat, definition of term: Nihil Obstat
nihil+obstat_pag1.html