flashover

[flash-oh-ver]

flash·o·ver

[flash-oh-ver]
noun
1.
Electricity. a disruptive discharge around or over the surface of a solid or liquid insulator.
2.
the moment of conflagration or complete incineration caused by superheated air or combustibles.
verb (used without object)
3.
Electricity. to have or experience a flashover.

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Flashover is one of our favorite verbs.
So is subtilize. Does it mean:
to expurgate (a written work) by removing or modifying passages considered vulgar or objectionable.
to introduce subtleties into or argue subtly about.

Origin:
1890–95; orig. noun use of verb phrase flash over
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Collins
World English Dictionary
flashover (ˈflæʃˌəʊvə)
 
n
1.  an electric discharge over or around the surface of an insulator
2.  the sudden and rapid spread of fire through the air, caused by the ignition of smoke or fumes from surrounding objects

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