A*dust" (#), a. [L. adustus, p. p. of adurere: cf. F. aduste.]
1.
Inflamed or scorched; fiery. "The Libyan air adust."
Milton.
2.
Looking as if or scorched; sunburnt.
A tall, thin man, of an adust complexion.
Sir W. Scott.
3. Med.
Having much heat in the constitution and little serum in the blood. [Obs.] Hence: Atrabilious; sallow; gloomy.
© Webster 1913.