nebula-, nebul- (Latin: mist, fog, cloud, smoke).circumnebulous: 
Surrounded by clouds.
 
nebula: 
1. A cloudlike  patch in the sky.  
2. A region or cloud of interstellar dust and gas appearing variously as a hazy bright or dark patch. 3. A faint cloudy area or scar on the cornea of the eye. 4. Cloudiness in the urine. 5. Liquid prepared for use in any kind of atomizing sprayer; especially, a nebulizer. nebulate: 
To become cloudy or turbid.
 
nebulated: 
Clouded, dimmed.
 
nebule: 
A cloud; a mist or fog.
 
nebulium: 
Name of an unidentified chemical element.
 
nebulize, nebulizing, nebulized, nebulizes: 
To reduce a liquid to a fine spray for medical use; to vaporize.
 
nebulization: 
Spraying or vaporization.
 
nebulizer: 
1. A device, with a face mask attached, for administering a medicinal liquid in the form of a fine spray that is breathed in through the mouth and/or nose.  
2. A device used to reduce liquid medication to extremely fine cloudlike particles; useful in delivering medication to deeper parts of the respiratory tract. nebulose: 
1. Resembling a cloud or mist; inclined to be foggy or misty.  
2. Cloudy, misty, indistinct. 3. Clouded; cloud-like in appearance. nebulosity: 
1. Nebulous or having an indistinctly luminous appearance; a faintly luminous patch or mass.  
2. Nebulous state or form; matter in a nebulous condition. 3. Cloudiness; indistinctness. nebulous: 
1.  Not clear, distinct, or definite; vague.  
2. Clouded, cloudy, misty; resembling a cloud or clouds. 3. Hazy, vague, indistinct, formless. 4. In astronomy, a small cluster of indistinct stars, or a star that is surrounded by a luminous haze. 5. Resembling a nebula. nebulosness: 
The condition of being nebulous; cloudiness,  mistiness. 
 
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