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[uh-set-l-een, -in] /əˈsɛt lˌin, -ɪn/
noun, Chemistry
a colorless gas, C 2 H 2 , having an etherlike odor, produced usually by the action of water on calcium carbide or by pyrolysis of natural gas: used especially in metal cutting and welding, as an illuminant, and in organic synthesis.
Also called ethine, ethyne.
1860-65; acetyl + -ene
Related forms
[uh-set-l-en-ik] /əˌsɛt lˈɛn ɪk/ (Show IPA),
adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for acetylenic


a colourless flammable gas used in the manufacture of organic chemicals and in cutting and welding metals. Formula: C2H2 Systematic name ethyne
  1. another name for alkyne
  2. (as modifier) acetylene series
Derived Forms
acetylenic (əˌsɛtɪˈlɛnɪk) adjective
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for acetylenic
1864, coined by Fr. chemist Marcelin-Pierre-Eugène Berthelot (1823-1907) from acetyl (coined from acetic in 1839 by Ger. chemist Justus von Liebig) + chemical ending -ene.
Online Etymology Dictionary, © 2010 Douglas Harper
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acetylenic in Medicine

acetylene a·cet·y·lene (ə-sět'l-ēn', -ən)
A colorless, highly flammable, and explosive gas used for metal welding and cutting and as an illuminant.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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acetylenic in Science
  (ə-sět'l-ēn', -ən)   
A colorless, highly flammable or explosive gas with a characteristic sweet odor. It is used in welding torches and in the manufacture of organic chemicals such as vinyl chloride. Acetylene is the simplest alkyne, consisting of two carbon atoms joined by a triple bond and each attached to a single hydrogen atom. Also called ethyne. Chemical formula: C2H2.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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