Nebulosity \Neb`u*los"i*ty\, n. [L. nebulositas: cf. F. n['e]bulosit['e]] 1. The state or quality of being nebulous; cloudiness; haziness; mistiness; nebulousness.
The nebulosity . . . of the mother idiom. --I. Disraeli.
2. (Astron.) (a) The stuff of which a nebula is formed. (b) A nebula.