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Meaning of orcein

or•ce•in

Pronunciation: (ôr'sē-in), [key]
— n. Chem.
  1. a red dye, the principal coloring matter of cudbear and orchil, obtained by oxidizing an ammoniacal solution of orcinol.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.