01 v. i. To enlarge or expand with heat; to swell; specifically, to swell up or bubble up under the action of heat, as before the blowpipe.
imp. & p. p.
Intumesced; p. pr. & vb. n.
Intumescing
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1.
To enlarge or expand with heat; to swell; specifically, to swell up or bubble up under the action of heat, as before the blowpipe.“In a higher heat, it intumesces, and melts into a yellowish black mass.” — Kirwan.