- quassation
- The breaking up of crude drug materials, such as bark and woody stems, into small pieces to facilitate extraction and other treatment. [L. quassatio, fr. quasso, pp. -atus, to shake violently, fr. quatio, to shake]
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quas·sa·tion (kwah-saґshən) [L. quassatio] the crushing of drugs, or their reduction to small pieces.
Medical dictionary. 2011.