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naphthene

[naf-theen, nap-] /ˈnæf θin, ˈnæp-/
noun, Chemistry
1.
any of a group of hydrocarbon ring compounds of the general formula, C n H 2n , derivatives of cyclopentane and cyclohexane, found in certain petroleums.
Origin
1840-1850
1840-50; naphth- + -ene
Related forms
naphthenic
[naf-thee-nik, -then-ik, nap-] /næfˈθi nɪk, -ˈθɛn ɪk, næp-/ (Show IPA),
adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for naphthenic

naphthene

/ˈnæfθiːn; ˈnæp-/
noun
1.
any of a class of cycloalkanes, mainly derivatives of cyclopentane, found in petroleum
Word Origin
C20: from naphtha + -ene
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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naphthenic in Science
naphthene
  (nāf'thēn', nāp'-)   
See cycloalkane.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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