Phlo-rīd'ēlne or Phlō'ri-ēlne, n.

n. [From Gr. φλοιώδης, having roots covered with coats of rind or peel, from φλοιός, peel, bark, and ῥίζα, root.] (Chem.) A crystallizable substance closely allied to salicine, of a bitter, astringent taste, obtained from the bark of the root of the apple, pear, and some other trees.