Category:Nebula

Neb"u*la, n.; pl. Nebulæ. Etym: [l., mist, cloud; akin to gr. nebel Mist, ohg. nebul, d. nevel, skr. nabhas cloud, mist. Cf. Nebule.]

1. (astron.)

Defn: 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.

2. (med.) (a) a white spot or a slight opacity of the cornea. (b) a cloudy appearance in the urine. [obs.]