Neb`u*los"i*ty (?), n. [L. nebulositas: cf. F. n'ebulosit'e]
1.
The state or quality of being nebulous; cloudiness; hazeness; mistiness; nebulousness.
The nebulosity ... of the mother idiom.
I. Disraeli.
2. Astron. (a)
The stuff of which a nebula is formed.
(b)
A nebula.
© Webster 1913.