red fire
/ˈrɛd ˈfʌɪə/noun
An intense red light produced by pyrotechnics; (now chiefly historical ) a mixture ignited to produce this, typically containing strontium.
adjective
Poetic. That resembles red fire. rare.
Origin
Late 17th century; earliest use found in Paul Rycaut (1629–1700), diplomat and author. From red + fire.