intumescence

The oxide is reduced with intumescence to the metallic state, and the bead becomes clear again.

From A System of Instruction in the Practical Use of the Blowpipe Being A Graduated Course Of Analysis For The Use Of Students And All Those Engaged In The Examination Of Metallic Combinations by Anonymous

Tin-oxides combine with carbonate of soda, in the flame of oxidation upon platinum wire, with intumescence to a bulky and confused mass, which is insoluble in more soda.

From A System of Instruction in the Practical Use of the Blowpipe Being A Graduated Course Of Analysis For The Use Of Students And All Those Engaged In The Examination Of Metallic Combinations by Anonymous

Microcosmic salt dissolves the compounds of antimony in the flame of oxidation with intumescence, to a clear light-yellow colored bead, which when cold is colorless.

From A System of Instruction in the Practical Use of the Blowpipe Being A Graduated Course Of Analysis For The Use Of Students And All Those Engaged In The Examination Of Metallic Combinations by Anonymous

Here, an intumescence which was to become a mountain, there, an abyss which was to be filled with an ocean or a sea.

From The Underground City, or, the Child of the Cavern by Jules Verne

However, I may tell you that the bird is simous; yblent in the sunlight, but withal strenuous-eyed; its blood inclined to intumescence.

From The O'Ruddy A Romance by C. D. (Charles D.) Williams