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[awr-suh-nawl, -nol] /ˈɔr səˌnɔl, -ˌnɒl/
noun, Chemistry
a white, crystalline, water-soluble solid, C 7 H 8 O 2 , sweet but unpleasant in taste, that reddens on exposure to air: obtained from many lichens or produced synthetically and used chiefly as a reagent for certain carbohydrates.
Also, orcin
[awr-sin] /ˈɔr sɪn/ (Show IPA)
Origin of orcinol
1875-80; < New Latin orcin(a) (< Italian orcello orchil, by alteration) + -ol2 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for orcin


a colourless crystalline water-soluble solid that occurs in many lichens and from which the dyes found in litmus are derived. Formula: CH3C6H3(OH)2
Word Origin
C20: from New Latin orcina, from Italian orcelloorchil
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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