Webster's English Dictionary

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nebulous

neb.u.lous \'neb-y*-l*s\ aj [L nebulosus, fr. nebula] archaic  1a: CLOUDY, 
   FOGGY  1b: HAZY, INDISTINCT  2: of, relating to, or resembling a nebula : 
   NEBULAR  - neb.u.lous.ly av