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n. pl. neb·u·los·i·ties
1. The quality or condition of being nebulous.
2. Astronomy
a. A nebula or a nebulalike object.
b. A mass of material constituting a nebula.


n, pl -ties
1. the state or quality of being nebulous
2. (Astronomy) astronomy a nebula


(ˌnɛb yəˈlɒs ɪ ti)

n., pl. -ties.
1. cloudy or cloudlike matter.
2. a nebulous form, shape, or mass.
3. the state or condition of being nebulous.
[1755–65; < Late Latin nebulōsitās]
References in classic literature ?
In their turn, again, these rings of cosmical matter, excited by a rotary motion about the central mass, would have been broken up and decomposed into secondary nebulosities, that is to say, into planets.
Caption: NESTED NEBULOSITIES In addition to the brighter, inner nebulosity, M27 also displays a fainter, more extended nebula.
Bobrovnikoff in the Publications of the Astronomical-Society of the Pacific entitled 'The Origin of Asteroids', the question of nebulosities around asteroids is addressed.
By the end of his career, however, Herschel came to believe that cloudy material was very common, so he published a catalog of extensive diffuse nebulosities in 1811.
Barnard didn't mention Roberts by name, but it's clear where his invective was directed: "These nebulosities ...
It reveals a degree-wide gossamer haze of gas and dust arching from southeast (lower left) to northwest (upper right), with delicate tendrils of bright and dark nebulosities extending north and east of AE Aurigae.
Many of them lie in the direction of the galactic center and are too distant and too small to have their nebulosities resolved by ground-based telescopes.