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Pronunciation: us'tyu-la'shun


  1. Separation of compounds by heat, as in the process of freeing ores from sulfur by roasting.
  2. Drying of a drug by heat to prepare it for pulverization.

[L. ustulo, pp. -atus, to scorch]

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.