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nebulosity

[neb-yuh-los-i-tee] /ˌnɛb yəˈlɒs ɪ ti/
noun, plural nebulosities.
1.
nebulous or nebular matter.
2.
a nebulous form, shape, or mass.
3.
the state or condition of being nebulous.
Origin
1755-1765
1755-65; < Late Latin nebulōsitās. See nebulose, -ity
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for nebulosity
  • Not having seen the object, my guess is that your observant student has caught a bit of nebulosity or a unique formation of stars.
British Dictionary definitions for nebulosity

nebulosity

/ˌnɛbjʊˈlɒsɪtɪ/
noun (pl) -ties
1.
the state or quality of being nebulous
2.
(astronomy) a nebula
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for nebulosity
n.

1738, from French nébulosité, from Late Latin nebulositatem (nominative nebulositas), from Latin nebulosus, from nebula (see nebula).

Online Etymology Dictionary, © 2010 Douglas Harper
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