Pronunciation: (neb'yu-lu), [key]
—pl. -laePronunciation: (-lē", -lī"), [key] -las.
a. Also called diffuse nebula. a cloud of interstellar gas and dust. Cf. dark nebula, emission nebula, reflection nebula.
b. (formerly) any celestial object that appears nebulous, hazy, or fuzzy, and extended in a telescope view.
a. a faint opacity in the cornea.
b. cloudiness in the urine.
3. any liquid medication prepared for use as a spray.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.