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Meaning of accelerant

ac•cel•er•ant

Pronunciation: (ak-sel'ur-unt), [key]
— n.
  1. something that speeds up a process.
  2. 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.