Source : Webster's Revised Unabridged Dictionary (1913)

Nebulose \Neb"u*lose`\, a.
   Nebulous; cloudy. --Derham.

Source : WordNet®

nebulose
     adj : lacking definite form or limits; "gropes among cloudy issues
           toward a feeble conclusion"- H.T.Moore; "nebulous
           distinction between pride and conceit" [syn: {cloudy},
           {nebulous}]