rare. [as if ad. L. efflagrātiōn-em, f. efflagrāre, f. ex out + flagrāre to blaze.] Emission of flames.
1
1811. Pinkerton, Petral., II. 271. This mountain [Vesuvius] was formerly in a state of efflagration. Ibid., 304. When the efflagration ceased, the lava which formed the great mass upon the bottom of the sea, [etc.].
