oreoselin


From The Collaborative International Dictionary of English v.0.48:

Oreoselin \O`re*os"e*lin\, n. (Chem.)
   A white crystalline substance which is obtained indirectly
   from the root of an umbelliferous plant ({Imperatoria
   Oreoselinum}), and yields resorcin on decomposition.
   [1913 Webster]
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