flashover

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noun flash·over \ˈflash-ˌō-vər\

Definition of flashover

  1. 1 :  an abnormal electrical discharge (as through the air to the ground from a high potential source or between two conducting portions of a structure)

  2. 2 :  the sudden spread of flame over an area when it becomes heated to the flash point

1892

First Known Use of flashover

1892

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