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deflagration (n.)

"a setting on fire," c. 1600, from Latin deflagrationem (nominative deflagratio) "a burning up, conflagration," noun of action from past-participle stem of deflagrare, from de (see de-) + flagrare "to burn, blaze, glow," from PIE root *bhel- (1) "to shine, flash, burn." Related: Deflagrate, deflagrating.

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