noun
ignition point; flash point
Technical term for the lowest temperature at which a substance ignites in air. Used in chemistry, fire safety, and engineering contexts.
ガソリンの発火点は約300度です。
The flash point of gasoline is about 300 degrees.
この物質は発火点が低いので、取り扱いに注意が必要だ。
This substance has a low ignition point, so it must be handled with care.
Compound of 発火 (ignition) + 点 (point). The exact historical derivation is uncertain, but the term follows standard Sino-Japanese word formation patterns for technical vocabulary.