follow Dictionary.com

Submit your word to be a Word of the Day!

naphthalene

[naf-thuh-leen, nap-] /ˈnæf θəˌlin, ˈnæp-/
noun, Chemistry
1.
a white, crystalline, water-insoluble hydrocarbon, C 1 0 H 8 , usually obtained from coal tar: used in making dyes, as a moth repellant, etc.
Also, naphthaline, naphthalin
[naf-thuh-lin, nap-] /ˈnæf θə lɪn, ˈnæp-/ (Show IPA)
.
Also called tar camphor.
Origin
1865-1870
1865-70; naphth- + -al3 + -ene
Related forms
naphthalic
[naf-thal-ik, nap-] /næfˈθæl ɪk, næp-/ (Show IPA),
naphthalenic
[naf-thuh-len-ik, nap-] /ˌnæf θəˈlɛn ɪk, ˌnæp-/ (Show IPA),
adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source
British Dictionary definitions for naphtha-lenes

naphthalene

/ˈnæfθəˌliːn; ˈnæp-/
noun
1.
a white crystalline volatile solid with a characteristic penetrating odour: an aromatic hydrocarbon used in mothballs and in the manufacture of dyes, explosives, etc. Formula: C10H8
Derived Forms
naphthalic (næfˈθælɪk; næp-) adjective
Word Origin
C19: from naphtha + alcohol + -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
Cite This Source
Word Origin and History for naphtha-lenes

naphthalene

n.

1821, coined by English chemist John Kidd (1775-1851), who first isolated and studied it, from naphtha + chemical suffix -ine (2) + -l- for the sake of euphony.

Online Etymology Dictionary, © 2010 Douglas Harper
Cite This Source
naphtha-lenes in Medicine

naphthalene naph·tha·lene or naph·tha·line (nāf'thə-lēn', nāp'-) or naph·tha·lin (-lĭn)
n.
A toxic carcinogenic hydrocarbon derived from coal tar or petroleum and used as a solvent.


naph'tha·len'ic (-lěn'ĭk) adj.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Cite This Source
naphtha-lenes in Science
naphthalene
  (nāf'thə-lēn')   
A white crystalline compound made from coal tar or petroleum and used to make dyes, mothballs, explosives, and solvents. Naphthalene consists of two benzene rings fused together. Chemical formula: C10H8.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source

Word of the Day

Difficulty index for naphthalene

Few English speakers likely know this word

Word Value for naphtha

15
15
Scrabble Words With Friends

Nearby words for naphtha-lenes