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|flash point |
The lowest temperature at which the vapor of a flammable liquid will ignite in air. The flash point is generally lower than the temperature needed for the liquid itself to ignite.
For a given flammable substance, the lowest temperature at which vapors passing from the substance into the air will catch fire spontaneously if a small flame is present.
The place or time when something ''takes fire,'' becomes exciting and exemplary: We want the White House to function as a flash point for whatever's great in this couintry
[1990s+; in the technical sense, ''lowest point of ignition of a fluid, compound, etc,'' the term is found by the 1870s]
the lowest temperature at which a petroleum product will burn. Below this temperature insufficient petroleum vapour is available to support combustion. Before gasoline became important, kerosene was the main petroleum product produced. The tendency to leave as much of the highly volatile gasoline as possible in the kerosene caused numerous fires and explosions in tanks and oil lamps. Legal measures were instituted to curb the danger, and test methods were prescribed and minimum flash points set