deflagration

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deflagration

[‚def·lə′grā·shən]
(chemistry)
A chemical reaction accompanied by vigorous evolution of heat, flame, sparks, or spattering of burning particles.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

deflagration

Burning; the rapid combustion of a substance, attended with an extremely sudden evolution of flame and vapor.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.