a white, crystalline, water-insoluble hydrocarbon, C10H8, usually obtained from coal tar: used in making dyes, as a moth repellant, etc.
- Also called tar camphor .
- Also naph·tha·line, naph·tha·lin [naf-thuh-lin, nap-]. /ˈnæf θə lɪn, ˈnæp-/.
- naph·thal·ic [naf-thal-ik, nap-], /næfˈθæl ɪk, næp-/, naph·tha·len·ic [naf-thuh-len-ik, nap-], /ˌnæf θəˈlɛn ɪk, ˌnæp-/, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use naphthalene in a sentence
Eighteen different facilities emit a variety of cancer-causing pollutants such as benzene, butadiene and naphthalene into the air of Port Arthur and its neighboring towns.
The undissolved hydrocarbon is similarly purified by fractional distillation, and furnishes the solid crystalline naphthalene.
Owing to the structure of the naphthalene molecule there are two isomeric naphthols, whereas there is only one phenol.
Secondary azo-colours derived from these bases and the usual naphthalene derivatives are also manufactured.
Other colouring-matters of the same group are in use; some of them, like “new blue,” being derivatives of naphthalene.
In addition to the azo-colours, there are certain other products which claim naphthalene as a raw material.
British Dictionary definitions for naphthalene
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: C 10 H 8
- naphthalic (næfˈθælɪk, næp-), adjective
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
Scientific definitions for naphthalene
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 © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.