neb·u·lous /ˈnɛbjələs/
  (a.)星雲的,星雲狀的,朦朧的
  Neb·u·lous a.
  1. Cloudy; hazy; misty.
  2. Astron. Of, pertaining to, or having the appearance of, a nebula; nebular; cloudlike.
  -- Neb*u*lous*ly, adv. -- Neb*u*lous*ness, n.
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  nebulous
       adj 1: lacking definite form or limits; "gropes among cloudy issues
              toward a feeble conclusion"- H.T.Moore; "nebulous
              distinction between pride and conceit" [syn: cloudy,
               nebulose]
       2: lacking definition or definite content; "nebulous reasons";
          "unfixed as were her general notions of what men ought to
          be"- Jane Austen [syn: unfixed]