Pronunciation: (ak-sel'ur-unt), [key]
1. something that speeds up a process.
2. Chem.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.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.