flashover

詳細解釋：

flash.o.ver

n.（名詞）
An unintended electric arc, as between two pieces of apparatus.
飛弧：如在兩塊器械之間產生的一道隨意性的電弧
The temperature point at which the heat in an area or a region is high enough to ignite all flammable material simultaneously.
燃點：能夠同時點燃某一區域或範圍內所有可燃物所需的溫度