1. a medicinal liquid preparation intended for use in an atomizer
2. cloudiness of the urine
3. an immense cloud of gas (mainly hydrogen) and dust in interstellar space
4. (pathology) a faint cloudy spot on the cornea
The Collaborative International Dictionary of English v.0.48:
Nebula \Neb"u*la\ (n[e^]b"[-u]*l[.a]), n.; pl. Nebulae
(n[e^]b"[-u]*l[=e]). [L., mist, cloud; akin to Gr. nefe`lh,
ne`fos, cloud, mist, G. nebel mist, OHG. nebul, D. nevel,
Skr. nabhas cloud, mist. Cf. Nebule.]
1. (Astron.) A faint, cloudlike, self-luminous mass of matter
situated beyond the solar system among the stars. The term
was originally applied to any diffuse luminous region.
Now, technically, it is applied to interstellar clouds of
dust and gases (diffuse nebula). However distant
galaxies and very distant star clusters often appear like
them in the telescope, such as the spiral nebula in
Andromeda, known now to be a distant galaxy.
[1913 Webster +PJC]
(a) A white spot or a slight opacity of the cornea.
(b) A cloudy appearance in the urine. [Obs.]
WordNet (r) 3.0 (2006):
n 1: a medicinal liquid preparation intended for use in an
2: cloudiness of the urine
3: an immense cloud of gas (mainly hydrogen) and dust in
4: (pathology) a faint cloudy spot on the cornea
Moby Thesaurus II by Grady Ward, 1.0:
19 Moby Thesaurus words for "nebula":
Black Magellanic Cloud, Crab Nebula, Gegenschein,
bright diffuse nebula, coalsack, counterglow, dark cloud,
dark nebula, diffuse nebula, dust cloud, gaseous nebula,
nebula of Lyra, nebular hypothesis, nebulosity, nebulous stars,
planetary nebula, ring nebula, the Coalsack, zodiacal light
The Free On-line Dictionary of Computing (30 December 2018):
An early business-oriented language from ICL for the
Ferranti Orion computer.
["NEBULA - A Programming Language for Data Processing", T.G.
Braunholtz et al, Computer J 4(3):197-201 (1961)].