flashover

  1. (countable, uncountable) The near simultaneous ignition of all combustible material in an enclosed area.
  2. (countable, uncountable) An unintended electric discharge or arc over or around an insulator.

Etymology

Deverbal from flash over.

spark-over

arc-over

ومضة كهربائيّة

σπινθηρισμός

embrasement généralisé éclair

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