backflash

Etymology

From back + flash.

backflash means The hazardous situation where the flame propagates backward down the hose of an oxyfuel welding and cutting system. Lexicurio rates it Sui generis — a strength score of 92 out of 100.

noun

The hazardous situation where the flame propagates backward down the hose of an oxyfuel welding and cutting system.
Synonym of flashback (“dramatic device”).“As an experienced editor I disapprove of backflashes, foreshadowings and tricksy devices […]”