The Collaborative International Dictionary of English v.0.48:

Non \Non\ (n[o^]n), a.
   No; not. See No, a. --Chaucer.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Non- \Non-\ (n[o^]n-) pref. [L. non, OL. noenu, noenum, fr.
   neoenum, lit., not one. See None.]
   A prefix used in the sense of not; un-; in-; as in
   nonattention, or non-attention, nonconformity, nonmetallic,
   nonsuit.
   [1913 Webster]

   Note: The prefix non- may be joined to the leading word by
         means of a hyphen, or, in most cases, the hyphen may be
         dispensed with. The list of words having the prefix
         non- could easily be lengthened.
         [1913 Webster]