WordReference Random House Unabridged Dictionary of American English © 2020
ac•cel•er•ant (ak sel′ər ənt),USA pronunciation n.
- something that speeds up a process.
- Chemistryaccelerator (def. 5).
- 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.
- Latin accelerant- (stem of accelerāns) hastening (present participle of accelerāre). See accelerate
'accelerant' also found in these entries: