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Pronunciation: pi-re'thrum

Definition: The root of Anacyclus pyrethrum (family Compositae), a shrub native to Morocco; has been used as a sialogogue; its flowers are a source of pyrethrins.

[G. pyrethron, feverfew, fr. pyr, fire, from the hot-tasting root]

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