What does adustion mean?
The definition of adustion
A*dus”tion, n.
Etym: [L. adustio, fr. adurere, adustum: cf. F. adustion.]

1 The act of burning, or heating to dryness; the state of being thus heated or dried. [Obs.] Harvey.
2 (Surg.)
Cauterization. Buchanan.