from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. C20H22O10, an organic compound extracted from certain lichens, a derivative of orsellinic acid.
  • n. Alternative form of erythrite.

from the GNU version of the Collaborative International Dictionary of English

  • n. A colorless crystalline substance, C20H22O10, extracted from certain lichens, as the various species of Rocella. It is a derivative of orsellinic acid. So called because of certain red compounds derived from it. Called also erythric acid.
  • n. See Erythrite, 2.

from The Century Dictionary and Cyclopedia

  • n. An organic principle (C20H22O10) obtained from Roccella tinctoria, Lecanora tartarea, and other lichens, which furnish the blue dyestuff called litmus.
  • n. Same as erythrite, 1.
  • n. A coal-tar color of the xanthene type, prepared by the methylation of eosin. It dyes silk a bluish red with a red fluorescence. Also called primrose.


from Wiktionary, Creative Commons Attribution/Share-Alike License

From Ancient Greek ἐρυθρός (eruthrós, "red"), from the colour of some of its compounds.


  • _erythrin_, which acts upon the central nervous system, diminishing its normal functions even to the point of abolishment, without modifying motor excitability or muscular contractility.

    The Medicinal Plants of the Philippines


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