Also, flashing point. Physical Chemistry . the lowest temperature at which a liquid in a specified apparatus will give off sufficient vapor to ignite momentarily on application of a flame.

a critical point or stage at which something or someone suddenly causes or creates some significant action

A 10 percent drop in mortgage rates will produce a flash point in the housing market.

a critical situation or area having the potential of erupting in sudden violence

The Mideast has been the flash point for a series of conflicts.

noun

breaking point , crisis , critical moment , hour of decision , moment of truth , turning point , zero hour , emergency , extremity