ac ‧ cel ‧ er ‧ ant /əkˈselərənt/ BrE AmE noun [countable] formal
a substance such as petrol that makes a fire spread or burn more strongly:
Police suspect that an accelerant was used in the arson attack.
ac ‧ cel ‧ er ‧ ant /əkˈselərənt/ BrE AmE noun [countable] formal
a substance such as petrol that makes a fire spread or burn more strongly:
Police suspect that an accelerant was used in the arson attack.
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012