Flash point
The temperature to which a material must be raised for it to ignite, but not continue to burn, when a flame is passed above it.
Aviation Maintenance Technician Handbook — Airframe, p. G-16
Also defined in 1 more source
The temperature to which a liquid must be raised for it to ignite, but not continue to burn when a flame is passed above it.
Aviation Maintenance Technician Handbook — Powerplant, p. G-12