accelerant

noun

1. something that speeds up a process.
2. Chemistry. accelerator(def 5).
3. a substance that accelerates the spread of fire or makes a fire more intense: Arson was suspected when police found accelerants at the scene of the fire.

noun

1. chem another name for accelerator (def. 3)

n.

1854, from Latin accelerantem (nominative accelerans), present participle of accelerare (see accelerate). As an adjective from 1890.

n.

1. Accelerator.

1. A substance, such as a petroleum distillate, that is used as a catalyst, as in spreading an intentionally set fire.