dot file

( n.)

   A  file  that  is not visible by default to normal directory-browsing
   tools  (on  Unix,  files named with a leading dot are, by convention,
   not  normally  presented in directory listings). Many programs define
   one  or  more dot files in which startup or configuration information
   may  be  optionally  recorded;  a  user  can  customize the program's
   behavior  by  creating  the  appropriate  file in the current or home
   directory.  (Therefore,  dot  files  tend  to  {creep}  -- with every
   nontrivial  application  program defining at least one, a user's home
   directory  can  be filled with scores of dot files, of course without
   the  user's  really being aware of it.) See also {profile} (sense 1),
   {rc file}.

[glossary]
[Reference(s) to this entry by made by: {profile}{rc file}]