nebula Meaning, Definition & Usage

  1. noun a medicinal liquid preparation intended for use in an atomizer
  2. noun cloudiness of the urine
  3. noun an immense cloud of gas (mainly hydrogen) and dust in interstellar space
  4. noun (pathology) a faint cloudy spot on the cornea

WordNet

Neb"u*la noun
Etymology
L., mist, cloud; akin to Gr. , , cloud, mist, G. nebel mist, OHG. nebul, D. nevel, Skr. nabhas cloud, mist. Cf. Nebule.
Wordforms
plural Nebulæ
Definitions
  1. (Astron.) A faint, cloudlike, self-luminous mass of matter situated beyond the solar system among the stars. True nebulæ are gaseous; but very distant star clusters often appear like them in the telescope. also applied now to galaxies
  2. (Med.) (a) A white spot or a slight opacity of the cornea. (b) A cloudy appearance in the urine. Obs.

Webster 1913