What was the name of the Byzantine incendiary weapon used at sea?

The Byzantine incendiary weapon used at sea was called Greek fire.

Greek fire was a closely guarded Byzantine military technology, used from roughly the seventh century onward. It was especially effective in naval warfare because the liquid could continue burning on water. Byzantine ships projected it through specialized bronze siphons, while other forms were placed in containers or thrown as incendiary grenades.

The weapon is associated with Kallinikos, an engineer from Heliopolis who is traditionally said to have brought the technology to Constantinople around AD 672. Its precise recipe has never been securely established. Historians generally think it involved petroleum or naphtha combined with combustible materials such as resins, but the surviving evidence is incomplete.

“Liquid fire,” “sea fire,” and “Roman fire” were names used in Byzantine sources or later descriptions, so they can sound plausible in a quiz. “Greek fire,” however, is the standard English name for the Byzantine weapon. It helped defend Constantinople against major Arab attacks and was also used against Rus’ and other naval enemies.