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brilliancy

[bril-yuh n-see] /ˈbrɪl yən si/
noun, plural brilliancies for 1.
1.
an instance of brilliance:
the brilliancies of Congreve's wit.
Origin of brilliancy
1740-1750
First recorded in 1740-50; brilli(ant) + -ancy
Related forms
overbrilliancy, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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Word Origin and History for brilliancy
n.

1747; see brilliant + -cy. Also cf. brilliance.

Online Etymology Dictionary, © 2010 Douglas Harper
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17
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