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[fyoo r-an, fyoo-ran] /ˈfyʊər æn, fyʊˈræn/
a colorless, liquid, unsaturated, five-membered heterocyclic compound, C 4 H 4 O, obtained from furfural: used chiefly in organic synthesis.
Also called furfuran.
Origin of furan
1890-95; aphetic form of furfuran Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for furan
  • The dioxin and furan compounds having from four to eight chlorine atoms are considered especially toxic.
  • All of the dioxin and furan compounds are considered potentially toxic.
British Dictionary definitions for furan


/ˈfjʊəræn; fjʊəˈræn/
a colourless flammable toxic liquid heterocyclic compound, used in the manufacture of cotton textiles and in the synthesis of nylon. Formula: C4H4O Also called furfuran
Word Origin
C19: shortened form of furfuran, from furfur
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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furan in Medicine

furan fu·ran (fyur'ān', fyu-rān')
Any of a group of colorless, volatile, heterocyclic organic compounds containing a ring of four carbon atoms and one oxygen atom, used in the synthesis of organics.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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furan in Science
  (fyr'ān', fy-rān')   
  1. Any of a group of colorless, volatile, organic compounds containing a ring of four carbon atoms and one oxygen atom. Furans are obtained from wood oils and used in the synthesis of many organic compounds.

  2. The simplest such compound, consisting of a furan ring with two double bonds and attached to four hydrogen atoms. Chemical formula: C4H4O.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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